更多"Most of Earth’s surface is ocean. T"的相关试题:
[单项选择]Surprisingly to those who view the ocean floor as a uniformly ______ waste, each vent in the floor, where seawater is heated by the earth’s inte-rior magma, has been found to be an island-like ______ with its own distinctive fauna.
A. teeming...habitat
B. lifeless...enclave
C. barren...oasis
D. sunken...grotto
E. hazardous...environment
[填空题]S3. If the temperature at the earth’s surface is 20F, the temperature in a coal mine 500 feet below the surface would be _____________________.
[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
[填空题]Earth’s surface releases some of the heat from the Sun as______.
[单项选择]In Earth’’s infancy, its surface was warm enough for life ____ the young Sun was fainter than it is today.
A. in spite of
B. whether
C. neither of which
D. even though
[单项选择]In Earth’s infancy, its surface was warm enough for life ____ the young Sun was fainter than it is today.
A. in spite of
B. whether
C. neither of which
D. even though
[填空题]Two-thirds of the earth’s surface (be)()covered with water.
[填空题]The average surface temperature of Earth keeps around 15℃.
[填空题]Two-thirds of the earth’s surface (be) ______ covered with water.
[单项选择]
All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood, coal, oil, natural gas, and all other fuels are stored energy from the sun. (80) Some was collected by this season’ s plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun fails as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun’ s outer layer, and much of this energy that is directed towards the earth never arrives. About nine tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half millionth of the sun’s entire output of radiant energy.
The sun is the source of all of the following EXCEPT()
A. gasoline
B. natural gas
C. atomic power
D. animal fat
[单项选择]All useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood.
Coal, oil, natural gas, and all other fuels are stored-up energy from the sun. Some was collected by this season’s plants as carbon compounds. Some was stored by plants and trees ages ago.
Even waterpower derives from the sun. Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power.
Light transmits only the energy that comes from the sun’s outer layers, and much of this energy that is directed toward the earth never arrives. About nine-tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half-billion of the sun’s entire output of radiant energy.
Of the sun’s entire output of radiant energy, the earth receives ______.
A. one tenth
B. nine tenths
C. all that comes from the sun’s outer layers
D. a very small portion