关于高压和低压系统中的升降气流，下列哪种说法正确（）。A.高压_爱下问搜题

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问题单项选择题

关于高压和低压系统中的升降气流，下列哪种说法正确（）。

A.高压区是上升气流区

B.北半球的高压区有下降气流，南半球的高压区有上升气流

C.低压区或低压槽是上升气流区

答案

参考答案：C

完形填空

任务型阅读
When you are in England, you must be very careful in the streets because the traffic goes on the left. Before you cross the street, you must look to the right first and then the left. If the traffic lights are red , the traffic must stop. Then the people on foot can cross the road. If the lights are green, the traffic can go and people on foot mustn’t cross. In the morning and in the evening when people go to or come back from work, the streets are very busy. The traffic is the most dangerous then.
When you go by bus in England, you have to be careful, too. You must always remember the traffic moves on the left. So you must be careful. Have a look first, or you’ll go the wrong way. In many English cities, there are big buses with two floors. You can sit on the second floor. From there you can see the city very well. That’ll be very interesting.

Title:____小题1:____ in England
On the streets	Buses and cars move on the ____小题2:___side
People crossing the street	Look to the ___小题3:____first and then the ___小题4:____
Red traffic lights	People on foot can walk ___小题5:___the road
___小题6:____traffic lights	Buses and cars can __小题7:_____
In the morning and ____小题8:___	The most dangerous traffic
Travelling by bus	Most buses with ___小题9:____floors
Travelling by bus	Sit on the ____小题10:___floor to see cities well

单项选择题

java.nio包的新特点是内存映射技术、字符及编码、非阻塞I/O和下列哪一项

A．显示图形信息

B．显示文本内容

C．显示文本和图形信息

D．显示程序代码