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【单选题】
2010年我国进行第六次人121普查，下列关于我国人口现状说法不正确的是（ ）。A.
我国是世界上人口最多的国家，约占世界的1/4
B.
目前我国每年净增人口仍然有1400万，计划生育政策在相当长的时期内，仍将是我国的基本人口政策
C.
以黑龙江省黑河至云南省腾冲一线为界的东南地区，国土面积不到全国的一半，人口却占到全国的94.4%
D.
我国人口的构成特点是农业人口占人口的比重大，但在工业化进程中，大批农村人口将逐步转变成城镇人口
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【单选题】When people speak of solar energy, they think only of the sun's rays heating a home or ______ electricity from the sun.
A.
derive
B.
by deriving
C.
of deriving
D.
to derive
【简答题】A．Land, oceans and plants can absorb the sun's rays. B．Not all the sun's energy that reaches Earth can stay there. C．It is warmer in outer space than it is on Earth. D．More energy comes in through the...
【单选题】The sun's rays are absorbed by______.
A.
clouds
B.
the heat waves in the atmosphere
C.
the surface of the earth
D.
water vapor
【单选题】Air and the sun's rays create much distortion, and whatever tends to _____ their influence is useful to the astronomer.
A.
exclude
B.
eliminate
C.
extinguish
D.
impose
【单选题】If the sun’s rays were entirely _______, there would be dramatic changes in the climate on the earth, and the result could be disastrous to the human race. [ ]
A.
covered out
B.
broken out
C.
blocked out
D.
left out
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