单项选择题

The turbulence detector can tell the severity of the turbulence by measuring

A．the speed of the plane.
B．the speed of the light.
C．the number of particles in the air.
D．the changes of the particles' speed.
<上一题 目录 下一题>
热门 试题

单项选择题
Thousands of Irish people starved during the Potato Famine because
A．they were so dependent on potatoes that they refused to eat anything else.
B．they were forced to leave their homeland and move to America.
C．the weather conditions in Ireland were not suitable for growing potatoes.
D．the potato harvest was bad.
单项选择题
Which country is the largest coffee producer
A．Brazil.
B．Colombia.
C．Ethiopia.
D．Egypt.
相关试题