D
Not long ago a California policeman stopped a driver for failing to stop at a red light. Asked his name, the driver said," Safety First. "Of course, the policeman did not believe the man. He thought the driver had been drinking. But the man was telling the truth. Safety First was his real name. Thousands of babies are given strange names each year,and many women acquire(获得) strange names through marriage. When Miss Nova Warrick married, she became Nova Cain.
There’s a Katz Meow in Washington D. C. and a Mr. Ache Payne in Illinois. Mr. Darling Dear resides(居住)in Wisconsin. A New York music teacher is named Love Sweetheart. Fish Hook lives in Illinois. Orange Vanilla Lemon resides in Idaho. But perhaps the strangest name of all is that of a Georgia man-W·5/Sths Smith.
What makes it rain Rain falls from clouds for the same reason anything falls to Earth. The Earth’s gravity pulls it. But every cloud is made of water droplets or ice crystals. Why doesn’t rain or snow fall constantly from all clouds The droplets or ice crystals in clouds are exceedingly small. The effect of gravity on them is minute. Air currents move and lift droplets so that the net downward displacement is zero, even though the droplets are in constant motion.
Droplets and ice crystals behave somewhat like dust in the air made visible in a shaft of sunlight. To the casual observer, dust seems to act in a totally random fashion, moving about chaotically without fixed direction. But in fact dust particles are much larger than water droplets and they finally fall. The average size of a cloud droplet is only 0. 0004 inch in diameter. It is so small that it would take sixteen hours to fall half a mile in perfectly still air, and it does not fall out of mo
A. they are kept aloft by air currents
B. they combine with other chemicals in the atmosphere
C. most of them evaporate
D. their electrical charges draw them away from the earth
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