Your homework habits might be affecting your grades. Are you feeling tired or bored when it comes to homework time? Are you arguing with parents about your grades? You can change the way you feel by taking better care of your mind and your body. Get the sleep you need.
Studies show that teens' natural sleeping habits are different from those of adults. This often causes less sleep among teens, since they tend to have trouble going to sleep at night, and have trouble waking in the mornings. You can avoid some of the problems that come with less sleep by changing some of your nighttime habits.
Improve your memory
A great way to improve your homework habits is to improve your memory with brain exercise. There are many theories and ideas about improving memory, but there is one mnemonic（记忆的） method that has been around since ancient times. Ancient accounts show that early Greek and Roman orators used the “loci” method of remembering long speeches and lists. You may be able to use this method to improve your memory at test time.
Fight the desire to delay
Do you get the sudden desire to feed the dog at homework time? Don't fall for it! Delay is like a little white lie we tell ourselves. We often think we'll feel better about studying later if we do something fun now, like playing with a pet, watching a TV show, or even cleaning our room. It's not true.
Avoid repetitive(重复的) stress
During text messaging, Internet surfing, and computer writing, you are using your hand muscles in all new ways, and you're very easily to be influenced by something dangerous or the repetitive stress injury. Find out how to avoid pain in your hands and neck by changing the way you sit at your computer.
【小题1】What differences between the teens and adults are mentioned in the passage?

A．Eating habits.

B．Sleeping habits.

C．Reading habits.

D．Writing habits

【小题2】      can help people to improve the memory.
A. Using the brain more     
B. Doing morning exercises every day
C. Dancing after meals      
C. Listening to the music
【小题3】What should people do to avoid the repetitive stress when they playing computer?

A．Changing the way they sit.

B．Cutting the time.

C．Wearing some special glasses.

D．Using the hand muscles in a new way.

【小题4】Which statement is NOT right according to the passage?

A．Homework habits can affect the study grade.

B．Only Roman orators were able to use the “loci” method to remember.

C．It's not good to desire to feed the pets when you are doing the homework.

D．There are four ideas of behaving Healthy Homework Habits mentioned.

（9分）许多实验研究生长素(IAA)对植物生长的影响模式，如用玉米胚芽鞘作为实验材料：
实验1：将切除的胚芽鞘尖端放置于琼脂块上(图1)，移去尖端后，将琼脂切成体积相等的若干个方块，将方块放在除去尖端的胚芽鞘上，实验进行一定时间后，每个胚芽鞘弯曲的角度以图2的方法测量，并计算平均值。每次放在等面积、等体积琼脂块上的胚芽鞘尖端数量不同，这样重复上述过程。

　实验2：用含有不同浓度IAA的琼脂块代替胚芽鞘尖端进一步实验。上述两个实验的结果如图3和图4所示。

（1）绘图表示，如何将琼脂块放置于胚芽鞘上，才能得到图3的结果?
（2）解释实验2的结果：IAA从0μmol/L～1.3μmol/L过程中    ；1.3μmol/L～1.8μmol/L过程中         。
（3）①比较实验1和实验2的结果有什么不同?             。
　  ②为什么会出现这种不同？                     。
（4）从本实验可知促进胚芽鞘生长的最适生长素浓度约为_______                    
图4中曲线上b点对应生长素浓度时胚芽鞘弯曲角度为17度，把琼脂块去掉后，胚芽鞘最终会如何生长？________                                                       

Foolish(silly) Freddie lived in a small village. The people of the village laughed at him. They liked to show visitors how silly Freddie was. They thought this was a funny thing to do.
One day, a visitor came to the village.
"Watch this", a villager said, and called to Freddie. "Come and play a game, Freddie, " he shouted. Freddie walked slowly towards him, a silly smile on his face.
"Look! Freddie, "the villager said, "I’ve got something for you." He showed Freddie a dollar coin and a much larger 50-cent coin."Which would you like?" he asked Freddie.
Freddie took the 50-cent coin at once.
The villager laughed."See how foolish he is," he said."He always does that. He’s too silly to learn anything." He walked away, leaving Freddie with the visitor.
The visitor felt sorry for Freddie and said to him, "Although the 50-cent coin is bigger than the＄1 coin, the＄1 coin is worth(值) much more.Two times as much."
"I know that," Freddie said."But once I take the＄1coin, they’ll stop playing the game."
【小题1】根据第一段The people of the village laughed at him. They liked to show visitors how silly Freddie was.描述,可知选D
【小题2】根据第一段They liked to show visitors how silly Freddie was. 描述,可知选A
【小题3】根据最后一段The visitor felt sorry for Freddie and said to him, "Although the 50-cent coin is bigger than the＄1 coin, the＄1 coin is worth(值) much more.描述,可知他认为弗雷迪不知道这些硬币的价值.故选D
【小题4】根据短文最后一句话"I know that," Freddie said."But once I take the＄1coin, they’ll stop playing the game."可知弗雷迪这样做只是为了让人们不断地给他钱,故选C,他其实很聪明.
【小题5】这篇短文主要描述了一个被村民们认为很傻的人,但是实际上这个人很聪明.故选B,foolish用引号括起来,表示相反的含义.
【小题6】People laughed at Freddie because__________.

A．he often made up jokes	B．he didn’t like money
C．he looked very funny	D．they thought he was a fool

【小题7】The villagers wanted to show the visitors___________.

A．how silly Freddie was	B．how clever Freddie was
C．How kind people were to Freddie	D．that Freddie had much money

【小题8】The visitor felt sorry for Freddie because he though_________.

A．Freddie did not know money was useful

B．the villager was not kind enough to the boy

C．Freddie did not get along well with the villagers

D．Freddie did not know the dollar coin was worth more

【小题9】From the story we know that Freddie was__________.

A．poor

B．kind

C．clever

D．silly

【小题10】The best title for the passage should be __________.

A．Clever Villagers	B．"Foolish" Freddie
C．Freddie and a Visitor	D．A Visitor and the Villagers

（5分））研究人员，发现菜豆种子在萌发成幼苗的过程中，体内储存的有机物会发生规律性的变化。以下是菜豆种子萌发成幼苗的各阶段示意图，请回答问题。

（1）图4中A→D阶段，种子中的有机物逐渐减少，原因是有机物（   ）
Ａ．被呼吸作用消耗了       Ｂ．被光合作用消耗了       
（2）图4中E→Ｆ阶段，幼苗体内的有机物又逐渐增加，原因是（    ）
A．根从土壤吸收了有机物         B．叶的光合作用制造了有机物
（3）以下哪幅图能表示图中A→F过程，有机物含量变化的情况（   ）
（4）进一步研究发现，若该项实验始终在黑暗中进行，有机物含量不断减少，原因是：
①　　　                                ， ②                            。

（5分））研究人员，发现菜豆种子在萌发成幼苗的过程中，体内储存的有机物会发生规律性的变化。以下是菜豆种子萌发成幼苗的各阶段示意图，请回答问题。

（1）图4中A→D阶段，种子中的有机物逐渐减少，原因是有机物（   ）
Ａ．被呼吸作用消耗了       Ｂ．被光合作用消耗了       
（2）图4中E→Ｆ阶段，幼苗体内的有机物又逐渐增加，原因是（    ）
A．根从土壤吸收了有机物         B．叶的光合作用制造了有机物
（3）以下哪幅图能表示图中A→F过程，有机物含量变化的情况（   ）
（4）进一步研究发现，若该项实验始终在黑暗中进行，有机物含量不断减少，原因是：
①　　　                                ， ②                            。