单项选择题

Why do tornadoes appear to be dark

A．They occur only at night.
B．They are funnel-shaped.
C．They pick up debris from the ground.
D．They are water-laden.
<上一题 目录 下一题>
热门 试题

单项选择题
According to the passage, some tornadoes take people unaware because they ______.
A．produce a sound similar to thunder
B．cannot be seen until it is too late
C．look so much like other clouds
D．carry so many large pieces of debris
单项选择题
Which of the following is NOT mentioned by the author as a criterion for determining a person's place in a traditional society
A．Family background.
B．Age.
C．Religious belief.
D．Custom.
相关试题