单项选择题

The speed of radio signals is ()a spaceship.

A．a little greater than
B．as great as
C．much greater than
D．less than

<上一题目录下一题>

热门试题

单项选择题

What does this passage mainly talk about()

A．TV can make advertisers aware of their products.
B．TV is more popular than any other medium in the United States.
C．TV covers a large audience at the same time.
D．TV carries more national advertising than other media in the United States.

单项选择题

Which of the following statements is true according to the passage()

A．Germany is the only country free from the drought.
B．Water reserves are at their lowest level in years due to the drought.
C．The drought is more serious in Europe than in Africa.
D．Europe will not have heavy rain until several years later.