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问题 选择题

当b＜0时，a，a-b，a+b中大小关系排列正确的是（　　）

A．a-b＞a+b＞a

B．a-b＞a＞a+b

C．a+b＞a＞a-b

D．a+b＞a-b＞a

答案

∵b＜0，

∴-b＞0，

∴a＞a+b，a-b＞a，

∴a-b＞a＞a+b．

故选B．

完形填空

第二节语法填空 (共5小题;每小题1分,满分5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，并将答案填写在答题卡标号为31—35的相应位置上。

The Internet has become part of young people’s life.A report shows that 38% of students often use the Internet . Most of them get   31  (use) information on the Internet  32  use the Internet to help in their studies. But many students don’t use it in a good way. Some play games too much, some visit websites  33_  shouldn’t look at. So bad things may happen __34_ students spend too much time on the Internet.

It is important for students to use the Internet properly. Now we have a textbook, _35__ uses many examples to teach students some good ways to use the Internet. It gives useful advice.
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单项选择题

下列装置不属于CRH1A型动车组Tp1车A转向架的是（）。

A.停放制动

B.轴端回流装置

C.速度传感器

D.自动过分相天线
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