单项选择题

How are tornadoes distinguished from whirlwinds

A．Whirlwinds rotate in a different direction than tornadoes do.
B．Tornadoes travel over land and whirlwinds over water.
C．Tornadoes are larger than whirlwinds.
D．Only tornadoes are funnel-shaped.

<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

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.