某健康的哺乳动物在20℃的环境中产热速率为Q1,散热速率为Q1′;进入0℃环境30min后的产热速率为Q2,散热速率为Q2′,则()
A.Q1=Q1′<Q2=Q2′
B.Q1=Q1′<Q2>Q2′
C.Q1>Q1′,Q2>Q1′
D.Q1<Q1′,Q2>Q2′
参考答案:A
某健康的哺乳动物在20℃的环境中产热速率为Q1,散热速率为Q1′;进入0℃环境30min后的产热速率为Q2,散热速率为Q2′,则()
A.Q1=Q1′<Q2=Q2′
B.Q1=Q1′<Q2>Q2′
C.Q1>Q1′,Q2>Q1′
D.Q1<Q1′,Q2>Q2′
参考答案:A
完形填空。 |
One afternoon just before Christmas, an old man was walking 1 the city center.The shop were |
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