下列实验中，实验材料与使用目的不相符的是实验名称实验材料使_爱下问搜题

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问题选择题

下列实验中，实验材料与使用目的不相符的是

	实验名称	实验材料	使用目的
A	绿叶在光下产生淀粉	酒精	脱色
B	观察人体口腔上皮细胞	清水	保持细胞正常形态
C	探究食物在口腔内的化学性消化	碘液	检验淀粉是否被消化
D	探究模拟酸雨影响植物种子的萌发	食醋和清水	酿制模拟酸雨

答案

答案：B

题目分析：A、绿叶在光下制造有机物的实验中，酒精的作用是脱去叶中叶绿素，有利于观察，故不符合题意；

B、为了便于观察，制作人口腔上皮细胞临时装片时，在载玻片上滴理盐水而不是清水，是为了保持细胞的正常形态，故符合题意；

C、碘液遇淀粉变蓝，所以研究馒头在口腔中的变化的实验中，碘液是检验淀粉是否被消化，故不符合题意；

D、模拟研究酸雨对生物的影响的实验中，向食醋中加清水，配制成“模拟酸雨”，故不符合题意；

故选B。

完形填空

Eleven-year-old Angela was attacked by a rare   21  affecting her nerve system. She was unable to walk and her movement was    22  in other ways as well. The doctors did not hold much    23   of her ever recovering from this illness. They    24 she'd spend the rest of her life in a wheelchair.They said that few, if any, were able to come back to    25 after suffering from this disease .The little girl was   26 . There, lying in her hospital bed, she would swear that she was   27  going to be walking again one day.
She was moved to a specialized    28 hospital in the San Francisco Bay area. All   29 that could be applied to her case were used. The doctors were moved by her undefeatable spirit. They taught her about imaging about seeing herself walking. If it would do   30 else, it would at least give her hope and something   31 to do in the long waking hours in her bed. Angela would work as hard as possible in physical treatments, and in exercise sessions. But she worked just as hard lying there faithfully doing her   32  , visualizing herself moving, moving, moving!
One day, 33 she was attempting, with all her might, to imagine her legs moving again, it seemed as though something 34  happened: the bed moved! It began to move around the room! She    35 out, "Look what I'm doing! Look! Look! I can do it”. I moved! I moved!"
Of course, at this very moment everyone else in the hospital was screaming, too, and running to a   36 place. People were screaming, equipment was  37 and glass was breaking. You see, it was the terrible San Francisco earthquake. 38 don't tell that to Angela. She    39  that she did it.
And now only a few years later, she's back in school, on her own   40  . No crutches, no wheelchair. You see, anyone who can shake the earth between San Francisco and Oakland can defeat a little disease, can't they?

B．approximately

B．instructions

B．interesting

D．appropriate

C．expectation

D．performance

A．accelerating

名词解释

侯景之乱