单项选择题

At the present time, experiments are being conducted in ______.

A．30-day" outlooks"
B．predicting storms
C．controlling weather
D．determining density of pressure groups
<上一题 目录 下一题>
热门 试题

单项选择题
The observation of weather conditions by satellites is advantageous because it ______.
A．enables man to alter the weather
B．makes weather prediction easier
C．gives the scientific information not obtained readily otherwise
D．uses electronic instruments
单项选择题
The word gains in the second sentence in the last paragraph means ______.
A．increases
B．progresses
C．profits
D．things
相关试题