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问题 选择题

读等高线图，下列说法正确的是（　　）

A．图中A点的海拔高度为600米

B．甲乙两地的垂直距离为50米

C．B处的相对高度最大不超过300米

D．若量得甲、乙两地的图上距离为2厘米，则实地距离为3千米

答案

读图可知，图中等高距为100米．

A、图中A点的海拔高度在500米以上、600米以下，故A不正确；

B、图中甲地海拔是678米，乙地海拔是620米，两地的垂直距离为678米-620米=58米，故B不正确；

C、图中B处为陡崖，陡崖的相对高度H为（N-1）×等高距≤H＜（N+1）×等高距（N表示有N条等高线经过），计算可知，B处的相对高度H是：200米≤H＜400米，故C不正确；

D、根据比例尺=

图上距离
实地距离
，可以推出，实地距离=
图上距离
比例尺
=2÷
1
150000
=300000厘米=3千米，故D正确．

故选：D．

阅读理解

All students need to have good habits (习惯): When you have good study habits, you can learn things quickly. You can also remember (记住) them easily.

Do you like to study in the living room? This is not a good place because it is usually too noisy. You need to study in a quiet place, like your bedroom. A quiet place will help you only think about one thing, and you will learn better.

Before you study, do not forget to clean your desk. A good desk light is important (重要的), too. You’ll feel tired easily if (如果) there is not enough light.

小题1:When you have good study habits, you will ________.

A．learn things quickly

B．remember things easily

C．think about one thing

D．both A and B小题2:The living room is not a good place for study because it is too ________.

A．quiet

B．noisy

C．good

D．clean小题3:You should remember to ________ before you study.

A．clean the desk

B．clean the room

C．open the door

D．open the window小题4:You’ll feel tired easily if the light is ________.

A．enough

B．good

C．bad

D．wonderful小题5:The best title (标题) for this passage is ________.

A．Study in the Bedroom

B．Good Study Habits

C．How to Study

D．Desk Light Is Important
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单项选择题

某病人行阑尾炎手术后4h，体温37.6℃，WBC12×109/L，LCR78%，MCR6%，SCR16%。你认为是

A．完全正常，可不予理会

B．是正常的术后反应，但应密切观察

C．术后并发感染，需大量应用抗生素

D．手术破坏了体温调节中枢

E．手术不成功，感染没有得到控制
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