A 20. D 21. A 22. B 23. C 查看更多

 

题目列表(包括答案和解析)

向质量分数为20%的烧碱溶液中加入3g烧碱和12g水,所得溶液的溶质质量分数为( )

A20%             B21%              C22%             D23%

 

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完型填空(共20小题;每小题1分,满分20分)
阅读下面短文,掌握其大意,然后从四个选项(A、B、C和D)中,选出最佳选项。
"Hey, Tahlia! How's the model?"
I had just taken a bite of my hot dog __21__ I heard a familiar voice yelling at me from across the crowded school yard. I saw a group of popular girls who were all __22__.
"What kind of __23_ are you going to do? An ad for a Frankenstein movie?" More laughter. My stomach twisted into a tight knot. How could they humiliate (羞辱) me like this, __24__ the entire school? As I walked into the cafeteria, I __25__ the dark scars on my right hand.
At 9 months old, I knocked over a tea pot and dumped boiling water allover my hands and stomach. My parents __26__ me to the hospital, but I had to have skin graft (移植) operation. I was in so much pain! But what __27__ me most were the cruel things people said about how I looked, __28__ that day at lunch.
The girls were being supermean to me because they'd heard I was considering doing some modeling. A close friend had suggested that I shouldn't let my scars limit me and that I might __29__ a good model.
But after that __30__ at school, I was sure I'd made a huge mistake. Upon arriving home, I covered the mirror with a blanket, fell on my bed and sobbed.
The next day, I __31__ myself to go to school. At lunch my best friend Jesse tried to encourage me: "You can't __32_ forever, Tahlia. So what if you have a few scars? Just go outside and show them that you're just as good as they are." Although I knew he was right, I couldn’t __33__ standing up for myself like that.
However, that night as I sat on the bed, my friend's words replayed in my mind. I'm __34__ hiding from myself, I thought. How stupid! Slowly, I stood up, walked over to the __35__, and tossed the blanket aside. There, in the mirror I saw a slim, dark-haired, blue-eyed girl, looking just fine, __36__ with a few scars.
The next day I wore a comfortable T-shirt to school. What's more, I had lunch outside the cafeteria, __37__ beside those mean girls. They were shocked that I should dare to walk into their territory. I felt __38_ too—free and happy.
Sometimes people still look at me strangely. They __39_ and stare, but I don't let it get to me. I have applied to several modeling companies, and at least one company is considering me for jobs. Maybe I'll never __40_ posing on the runway, but I do know one thing: I'm done.
【小题1】
A.as B.when C.while D.before
【小题2】
A.applauding B.cheering C.laughing D.quarreling
【小题3】
A.modeling B.writing C.drilling D.acting
【小题4】
A.in spite of B.in view of C.in terms of D.in front of
【小题5】
A.looked into B.searched for C.wondered aboutD.glanced at
【小题6】
A.presented B.sent C.rushedD.handed
【小题7】
A.hurtB.beat C.disappointed D.puzzled
【小题8】
A.for B.like C.on D.after
【小题9】
A.impressB.make C.consult D.defeat
【小题10】
A.effect B.phenomenon C.challenge D.scene
【小题11】
A.forced B.expected C.reminded D.preferred
【小题12】
A.apologize B.beg C.hide D.complain
【小题13】
A.consider B.imagine C.appreciate D.resist
【小题14】
A.hardly B.ever C.even D.gradually
【小题15】
A.blanket B.bed C.chair D.mirror
【小题16】
A.while B.though C.but D.because
【小题17】
A.right B.still C.therefore D.anyhow
【小题18】
A.sensitive B.uncomfortable C.different D.tense
【小题19】
A.compare B.associate C.wave D.whisper
【小题20】
A.give up B.end up C.put up D.set up

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水的作用不可忽视。下图中五个实验分别用到水。

   

请回答下列问题:

①实验A中水作    (19)  (填“溶剂”或“溶质”),玻璃棒的作用    (20)   

②实验B中反应的化学方程式为     (21)    ,集气瓶中水的作用是    (22)  

③实验C中反应的化学方程式是        (23)       ,烧杯中的水进入集气瓶中的原理是         (24)       

④实验D中水的作用是提供热量和             (25)                  

⑤用化学方程式表示实验E中水的作用         (26)                  

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下表表示夏季某湖泊随水深不同,水温和水中溶解氧的变化情况,收集这些数据是为了研究一些问题,下列问题中,不属于该项研究的是    (    )

水深(m)

水面

l

3

5

7

9

11

13

15

17

19

21

水温(℃)

23

22

21

20

15

10

6

5

5

4

4

4

溶解(mg/m)

12

12

11

9

6

4

3

3

3

2

2

2

A.鱼有时游到湖面甚至将嘴伸到湖面进行呼吸的理由

B.水温和溶解氧与阳光能射人湖水的深度之间的关系

C.浮游植物主要在近水面处生长的原因

D.湖泊中的溶解氧是否主要来自空气中的氧气

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