下列四边形中，一定有外接圆的是（ ） A．平行四边形 B．菱形 C．矩形 D．梯形
题型：选择题
问题：
下列四边形中，一定有外接圆的是（ ）
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题型：选择题
阅读短文，选择正确答案。
Typhoons are some of the worst storms, usually around the Pacific Ocean and the South China Sea. Most
happen in July, August and September.
How does a typhoon happen? When lots of sea water gets hot in the summer sun, it evaporates into the air.
This makes the air hotter. When the air gets warm enough, it starts to move higher up into the sky. Then,
cooler air around it rushes in. It fills the space that is left. After the air gets warmer, it starts to move quickly,
making wind. The wind goes in circles, and it keeps moving higher in the sky. The warmer the air gets, the
quicker the wind moves. And when the wind moves faster than 30 meters a second, a typhoon begins.
A typhoon has two parts, one is called the "eye". In the eye, the wind does not move so fast. The other part
is the wall of clouds around the eye. This is where the strongest wind and hardest rains are.
Typhoons are very dangerous. In 2004, Typhoon Yunna killed 164 people in Zhejiang, and 24 people were
missing. In May 2006, Typhoon Pearl hit Guangdong and Fujian, and thousands of houses were damaged.
What to do when a typhoon hits:
● Stay inside, close all the windows and stay away from them.
● Try to bring all of your things inside. Strong winds could even blow away your bikes!
● Listen to the radio or TV for important information.
● If you're told to go to a safer place, do so right away.
1. Typhoons often happen ________. [ ]
A. in the hot season
B. in the cold season
C. only in China
D. under the sea
2. Which picture can tell meaning of the underlined sentences "…, it starts to move higher up into the sky.
Then, cooler air around it rushes in."? [ ]
3. When a typhoon comes, we cannot _______. [ ]
A. close all the windows
B. listen to typhoon news
C. stay outside with our bikes
D. stay inside the strong house
4. This passage is mainly about ________. [ ]
A. the knowledge of typhoon
B. the eye of a typhoon
C. the names of typhoon
D. the most dangerous typhoon Yunna
5. Which of the following is TRUE according to the passage? [ ]
A. The warmer the air gets, the slower the wind moves.
B. This year Typhoon Pearl killed 164 people in Zhejiang.
C. The strongest winds and harder rains are in the eye of typhoon.
D. A typhoon will happen when the wind goes faster than 30 meters a second.