和地面建筑物有关的湍流强度依赖于障碍物的大小和风的基本速度，在山地区域时这种情况甚至
题型：单项选择题
问题：
和地面建筑物有关的湍流强度依赖于障碍物的大小和风的基本速度，在山地区域时这种情况甚至更加明显。风越过山脊时（）
A.风沿着迎风侧平稳地向上流动
B.风沿着迎风侧湍流逐渐增加
C.风沿着背风侧平稳地向下流动
题型：单项选择题
阅读理解。
Which animal do you think is "the king of the animals", the elephant, the lion or the tiger? They are all
large and strong. But I think the tiger is "the king of the animals". If you watch carefully, you
can find some black lines on the tiger's forehead (前额). The lines look like the Chinese word "WANG".
The word means "the king of the world" in Chinese.
Most of the tigers come from China and India. Tigers are dangerous animals. They look scary
(吓人的). They like eating meat. They have yellow fur with black lines. They usually weigh about 200
to 300kg. Tigers can run fast. They run at a speed of 20 meters per second.
Some people think they are dangerous. But they don't know tigers are in danger now. There are only
20 to 30 wild South China Tigers in China and less than 300 in the world. Lots of people kill them for
their fur. We should take action to protect them.
1. Which animal does the writer think is "the king of the animals" ?
A. The elephant.
B. The lion.
C. The tiger.
D. The lion and the tiger.
2. Some black lines on the tiger's forehead look like______.
A. 王
B. 汪
C. 主
D. 丰
3. Which of the following is NOT true according to the passage?
A. Tigers like eating meat.
B. All of the tigers come from China.
C. Tigers usually weigh about 200 to 300 kg.
D. Tigers can run at a speed of 20 meters per second.
4. How many wild South China Tigers are there in China?
A. There are less than 20.
B. There are only 20 to 30.
C. There are less than 200.
D. There are less than 300.
5. Why do you think the tigers are in danger?
A. Because the tigers couldn't find enough food to eat.
B. Because lots of people kill them for their safety.
C. Because lots of people think they are dangerous.
D. Because lots of people kill them for their fur.