皮皮学，免费搜题
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搜题
【单选题】
焦虑症的表现是A.
唉声叹气，快感缺失
B.
紧张担心，坐立不安
C.
容易兴奋，容易疲劳
D.
联想增多，兴奋不安
E.
自语自笑，行为怪异
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皮皮学刷刷变学霸
举一反三
【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
【简答题】衡量网络性能的主要标准是（）、（）。
【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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