更多"As evidence that the Earth's atmosp"的相关试题:
[单项选择]Only outside the Earth's atmosphere ______ to attain extremely high velocities.
A. to be safe for a space vessel
B. is safe for a space vessel
C. for a space vessel to be safe
D. a space vessel to be safe
[单项选择]The atmosphere is as much a part of the earth as ______ its soil and the water of its lakes, rivers and oceans.
A. are
B. is
C. do
D. has
[单项选择]It can be seen from the passage that the earth's supply of natural medicines
A. may never be exhausted.
B. may be dropping rapidly.
C. is surprisingly big.
D. is as rich-as ever.
[单项选择]Approximately (three - fourths) of (the earth's) surface (are) covered (with) water.
A. three-fourths
B. the earth’s
C. are
D. with
[单项选择]Scientists generally agree that the Earth's climate will warm up over the next 50 to 100 years ______ it has warmed in the 20000 years since the Ice Age.
A. as soon as
B. as long as
C. as much as
D. as well as
[单项选择]The atmosphere in the police chief's office was electric with contention.
A. discord
B. rejoicing
C. weeping
D. curiosity
[填空题]It has calculated that the earth's circumference around the equator is over forty miles longer than that around the poles().
[单项选择]What has happened to the earth's temperature over the last 18 years according to satellite data
A. It has increased slightly.
B. It has not changed.
C. It has decreased slightly.
D. It is not sure if it has changed.
[单项选择]Without the sun's light______the earth's surface, it would be so cold that life could not exist on the earth.
A. warms
B. warmed
C. warming
D. to warm
[单项选择]What percentage of the total earth's water does underground water make up
A. 0.05%.
B. 0.5%.
C. 4.5%.
D. 5%.
[单项选择]A small increase in the earth's temperature may bring about
A. a decline in agriculture.
B. a drop of the sea level.
C. the death of all animals.
D. a delay in the greenhouse effect.
[单项选择]It has been estimated that the earth's surface temperature has increased one quarter to three quarters of a degree since 1805.
A. to
B. by
C. at
D. with
[单项选择]What percentage of the earth's water can man actually use at present
A. Nearly 75 per cent.
B. About 97 per cent.
C. Exactly 3 percent.
D. Less than 3 per cent.