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问题 单项选择题

喷浆时，遇有超挖或裂缝低凹处要先喷补平整，然后再正常喷射，其主要原因是（）

A、使巷道美观

B、防止喷浆厚度不够

C、防止喷浆厚度过大，造成离层现象

D、增强混凝土体黏结力

答案

参考答案：C

完形填空

语法填空（共10小题； 每小题1.5分，满分15分）

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Animal testing

“It is always my ambition to be a research analyst studying amphibian anatomy（两栖动物解剖学 ）for the benefit of mankind.” said Dr. Cull to the high school students touring the laboratory. “My ancestors were all scientists and my father taught   1  that it is simply amazing to appreciate the details in each creature. I also hope that my research can help us to understand   2  humans influences these creatures so that we can know how to improve   3 (environment) problems and correct our wrongs.”

“You are very ambitious, Dr. Cull.” a bright, amber-haired girl said. “So you are looking for similarities between animals and humans?”

“Yes, and there are already enough findings. We know much about how anesthetics(麻醉药) work, for example,   4 (base) on clinical trials with rats.” “But I disagree with using animals for tests!” another student suddenly said. “  5  is often discussed whether using animals for testing is moral. But the knowledge we have collected about health, vaccines, antibiotics   6 (be) incredible. We have benefited a lot  7   animal research.”replied the Doctor.

“  8  I've seen videos of animals for research put in bad conditions.”Another student broke in.  “Oh, it seems that we've hit on   9  interesting topic.What about stepping into this conference room and discussing it   10 (far)？”
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问答题

（1）用游标为50分度的卡尺，测定某圆筒的内径时，示数如图所示，读数为______mm．

（2）在《练习使用示波器》的实验中，关于竖直位移旋钮↑↓和Y增益旋钮的作用，下列说法正确的是______

A．竖直位移旋钮用来调节图象在竖直方向的位置，Y增益旋钮用来调节图象在竖直方向的幅度

B．竖直位移旋钮用来调节图象在竖直方向的幅度，Y增益旋钮用来调节图象在竖直方向的位置

C．竖直位移旋钮和Y增益旋钮都是用来调节图象在竖直方向的位置

D．竖直位移旋钮和Y增益旋钮都是用来调节图象在竖直方向的幅度．
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