题目列表(包括答案和解析)
Even before my father left us, my mother had to go back to work to support our family. Once I came out of the kitchen, complaining, “Mom, I can’t peel potatoes. I have only one hand.”
Mom never looked up from sewing. “You get yourself into that kitchen and peel those potatoes,” she told me. “And don’t ever use that as an excuse for anything again!”
In the second grade, our teacher lined up my class on the playground and had each of us race across the monkey bars, swinging from one high steel rod to the next. When it was my turn, I shook my head. Some kids behind me laughed, and I went home crying.
That night I told Mom about it. She hugged me, and I saw her “we’ll see about that” look. The next afternoon, she took me back to school. At the deserted playground, Mom looked carefully at the bars.
“Now, pull up with your right arm,” she advised. She stood by as I struggled to lift myself with my right hand until I could hold the bar with my other elbow （肘）. Day after day we practiced, and she praised me for every rung （横档）I reached. I’ll never forget the next time, crossing the rungs, I looked down at the kids who were standing with their mouths open.
One night, after a dance at my new junior high, I lay in bed sobbing. I could hear Mom come into my room. “Mom,” I said, weeping, “none of the boys would dance with me.”
For a long time, I didn’t hear anything. Then she said, “Oh, honey, someday you’ll be beating those boys off with a bat.” Her voice was faint. I peeked out from my covers to see tears running down her cheeks. Then I knew how much she suffered on my behalf. She had never let me see her tears.
Which can be used to describe Mom’s attitude when she made the child peel potatoes?
A. Cruel. B. Favourable. C. Strict. D. Sympathetic.
From the passage, we know monkey bars can help a child train ______.
A. the strength and skill to hang and sway
B. the speed of one’s hand movement
C. the skill to throw and catch things
D. the bodily skill to rotate round a bar
What does the sentence “I saw her ‘we’ll see about that’ look” imply?
A. Mom believed every aim could be achieved if you stuck to it.
B. The race across monkey bars was not difficult enough for a child to give up.
C. Mom was determined to prove she herself was better than the teacher.
D. What the child had said brought Mom great attraction and curiosity.
When the author looked down at the kids, they were standing with their mouths open because
_______.
A. they felt sorry for what they had done before
B. they were afraid the author might fall off and get hurt
C. they wanted to see what the author would do on the bars
D. they were astonished to find the author’s progress
The most probable conclusion we can draw after reading the passage is ______.
A. the last incident was sad enough to make Mom weep
B. the child’s experience reminded Mom of that of her own
C. Mom could solve any problem except the one in the last paragraph
D. in fact Mom suffered more in the process of the child’s growth
Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the body—and the body from them—until they can be released at just the right spot. There are lots of ways to trigger(引发) this release, including changing temperature, acidity, and so on. But triggers can come with their own risks—burns, for example. Now, researchers in California have designed what could be a harmless trigger to date: shining near-infrared light (NIR,近红外线) on the drug in the capsule.
The idea of using light to liberate the drug in the capsule isn't new. Researchers around the globe have developed polymers (聚合物) and other materials that begin to break down when they absorb either ultraviolet (UV,紫外线) or visible light. But tissues also readily absorb UV and visible light, which means the drug release can be triggered only near the skin, where the light can reach the capsule. NIR light largely passes through tissues, so researchers have tried to use it as a trigger. But few compounds(化合物) absorb NIR well and go through chemical changes.
That changed last year when Adah Almutairi, a chemist at the University of California, San Diego, reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIR-absorbing group called o-nitrobenzyl (ONB). When they catch the light, ONB groups fall off the polymer, leading to its breakdown. But ONB is only a so-so NIR absorber, and it could be poisonous to cells when it separates from the polymer.
So Almutairi and her colleagues reported creating a new material for capsules that's even better. This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的) components that make it highly unstable in its polymeric form, a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols, they cap each reactive component with a light-absorbing compound called Bhc. When the Bhcs absorb NIR light, the reactive groups are exposed and break the long polymer into two short chains. Shining additional light continues this breakdown, potentially releasing any drugs in the capsule. What's more, Almutairi says, Bhc is 10 times better at absorbing NIR than is ONB and is not poisonous to cells.
【小题1】According to the passage, which of the following could be the best trigger?
| A．Temperature change. | B．NIR light. | C．Acidity change. | D．UV light. |
| A． It breaks down when it absorbs NIR light. |
| B． It falls off the polymer and triggers drug release. |
| C． It has not come onto the market up till now. |
| D． It is not effective enough and could be poisonous. |
| A．protected | B．formed | C．exposed | D．combined |
One day an out of work mimic(滑稽演员) is visiting the zoo and attempts to earn some money as a street performer. As soon as he starts to draw the crowd，a zoo keeper grabs him and drags him into his office. The zoo keeper explains to the mimic that the zoo's most popular attraction，a gorilla(大猩猩)，has died suddenly and the keeper fears that attendance at the zoo will fall off. He offers the mimic a job to dress up as the gorilla until they can get another one. The mimic accepts.
So the next morning the mimic puts on the gorilla suit and enters the cage before the crowd comes. He discovers that it's a great job. He can sleep all he wants，play and make fun of people and he draws bigger crowds than he ever did as a mimic. However，eventually the crowds tire of him and he tires of just swinging on wires. He begins to notice that the people are paying more attention to the lion in the cage next to his. Not wanting to lose the attention of his audience，he climbs to the top of his cage，crawls across a partition(隔离物)，and dangles from the top to the lion's cage. Of course，this makes the lion very angry，but the crowd loves it.
At the end of the day the zoo keeper comes and gives the mimic a raise for being such a good attraction. Well，this goes on for some time－the mimic keeps taunting the lion，the crowds grow larger，and his salary keeps going up. Then one terrible day when he is dangling over the angry lion he slips and falls. The mimic is terrified.
The lion gathers itself and prepares to attack. The mimic is so scared that he begins to run round and round the cage with the lion close behind. Finally，the mimic starts screaming and yelling，“Help me，help me！”But the lion is quick and attacks. The mimic soon finds himself flat on his back looking up at the angry lion and the lion says，“Shut up，you idiot！Do you want to get us both fired？”
36．The mimic visits the zoo to________.
A．take care of the dying gorilla B．beg some money from the zoo keeper
C．ask for a job there D．perform and earn some money there
37．The zoo keeper offers the mimic a job to act as the gorilla because________.
A．it is more expensive to hire a real gorilla
B．the real gorilla died but the keeper does not want to lose its visitors
C．he likes the mimic's performance
D．he wants to help the mimic who is out of work
38．What does the mimic feel about the new job at first?
A．He likes it because he has enough freedom in the job.
B．He likes it but he prefers to working as a mimic.
C．He doesn't like it for people do not respect him.
D．He doesn't like it because he gets little pay.
39．The mimic climbs to the lion's cage because________.
A．he finds it more interesting to climb the cage
B．he wants to play with the lion
C．he wants to attract the attention of his audience
D．he has never seen a lion before
40．What does the passage mainly tell us?
A. The mimic and his job B. The mimic and his success
C. The actor and the mimic D. The mimic and his animals
Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the body—and the body from them—until they can be released at just the right spot. There are lots of ways to trigger (引发) this release, including changing temperature, acidity, and so on. But triggers can come with their own risks—burns, for example. Now, researchers in California have designed what could be a harmless trigger to date: shining near-infrared light (NIR, 近红外线) on the drug in the capsule.
The idea of using light to liberate the drug in the capsule isn’t new. Researchers around the globe have developed polymers (聚合物) and other materials that begin to break down when they absorb either ultraviolet (UV, 紫外线) or visible light. But tissues also readily absorb UV and visible light, which means the drug release can be triggered only near the skin, where the light can reach the capsule. NIR light largely passes through tissues, so researchers have tried to use it as a trigger. But few compounds (化合物) absorb NIR well and go through chemical changes.
That changed last year when Adah Almutairi, a chemist at the University of California, San Diego, reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIR-absorbing group called o-nitrobenzyl (ONB). When they catch the light, ONB groups fall off the polymer, leading to its breakdown. But ONB is only a so-so NIR absorber, and it could be poisonous to cells when it separates from the polymer.
So Almutairi and her colleagues reported creating a new material for capsules that’s even better.This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的) components that make it highly unstable in its polymeric form, a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols, they cap each reactive component with a light-absorbing compound called Bhc. When the Bhcs absorb NIR light, the reactive groups are exposed and break the long polymer into two short chains. Shining additional light continues this breakdown, potentially releasing any drugs in the capsule. What’s more, Almutairi says, Bhc is 10 times better at absorbing NIR than is ONB and is not poisonous to cells.
【小题1】According to the passage, which of the following could be the best trigger?
| A．Temperature change. | B．NIR light. | C．Acidity change. | D．UV light. |
| A．It breaks down when it absorbs NIR light. |
| B．It falls off the polymer and triggers drug release. |
| C．It has not come onto the market up till now. |
| D．It is not effective enough and could be poisonous. |
| A．protected | B．formed | C．exposed | D．combined |
Even before my father left us, my mother had to go back to work to support our family. Once I came out of the kitchen, complaining, “Mom, I can’t peel potatoes. I have only one hand.”
Mom never looked up from sewing. “You get yourself into that kitchen and peel those potatoes,” she told me. “And don’t ever use that as an excuse for anything again!”
In the second grade, our teacher lined up my class on the playground and had each of us race across the monkey bars, swinging from one high steel rod to the next. When it was my turn, I shook my head. Some kids behind me laughed, and I went home crying.
That night I told Mom about it. She hugged me, and I saw her “we’ll see about that” look. The next afternoon, she took me back to school. At the deserted playground, Mom looked carefully at the bars.
“Now, pull up with your right arm,” she advised. She stood by as I struggled to lift myself with my right hand until I could hook the bar with my other elbow. Day after day we practiced, and she praised me for every rung I reached. I’ll never forget the next time, crossing the rungs, I looked down at the kids who were standing with their mouths open.
One night, after a dance at my new junior high, I lay in bed sobbing. I could hear Mom come into my room. “Mom,” I said, weeping, “none of the boys would dance with me.”
For a long time, I didn’t hear anything. Then she said, “Oh, honey, someday you’ll be beating those boys off with a bat.” Her voice was faint and cracking. I peeked out from my covers to see tears running down her cheeks. Then I knew how much she suffered on my behalf. She had never let me see her tears.
。Which of the following expressions can be used most suitably to describe Mom’s attitude when she made the child to peel potatoes?
A. Cruel. B. Serious. C. Strict. D. Cold.
. From the passage, we know monkey bars can help a child train ______.
A. the skill to throw and catch things
B. the speed of one’s hand movement
C. the strength and skill to hang and sway
D. the bodily skill to rotate round a bar
. What does the sentence “I saw her ‘we’ll see about that’ look” imply?
A. Mom believed every aim could be achieved if you stuck to it.
B. The race across monkey bars was not difficult enough for a child to give up.
C. Mom was determined to prove she herself was better than the teacher.
D. What the child had said brought Mom great attraction and curiosity.
. When the child looked down at the kids, they were standing with their mouths open because ______.
A. they felt sorry for what they had done before
B. they were afraid the author might fall off and get hurt
C. they wanted to see what the author would do on the bars
D. they were astonished to find the author’s progress
. The most probable conclusion we can draw after reading the passage is ______.
A. the last incident was sad enough to make Mom weep
B. the child’s experience reminded Mom of that of her own
C. Mom could solve any problem except the one in the last paragraph
D. in fact Mom suffered more in the process of the child’s growth
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