单项选择题


Questions 29 and 30 are based on the following news. At the end of the news item, you will be given I0 seconds to answer the questions.
Now, listen to the news.
What can we learn about the impactor

A．It is a little more than 180 kg.
B．It is about 3 tons.
C．It travels at a speed of 37 thousand kilometers an hour.
D．It travels at a speed of 17 thousand kilometers an hour.
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单项选择题
The example mentioned in the passage is to show ______.
A．the potential danger in the air travel
B．the importance of the pilots
C．air travel is much safer than other means of traveling
D．the role played by the air controller
单项选择题
Which of the following is NOT true
A．Two and a half thousand frontline veterans attend the anniversary.
B．The veterans came into the square in trucks.
C．Tens of millions of Soviet soldiers were killed in WWII.
D．Putin highly praised the allied troops.
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