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【单选题】
根据电介质中的高斯定理,在电介质中电位移矢量沿任意一个曲面的积分等于这个曲面所包围自由电荷的代数和。下面推论正确的是( )A.
若电位移矢量沿任意一个曲面的积分等于零，曲面内一定没有自由电荷
B.
若电位移矢量沿任意一个曲面的积分等于零，曲面内电荷的代数和一定为零
C.
介质中的高斯定理表明电位移矢量仅仅与自由电荷的分布有关
D.
介质中的电位移矢量与自由电荷和极化电荷的分布有关
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【单选题】To paraphrase 18th-century statesman Edmund Burke, 'all that is needed for the triumph of a misguided cause is that good people do nothing.' One such cause now seeks to end biomedical research because...
A.
call on scientists to take some actions
B.
criticize the misguided cause of animal rights
C.
warn of the doom of biomedical research
D.
show the triumph of the animal rights movement
【单选题】Text 2 To paraphrase 18th-century statesman Edmund Burke,“all that is needed for the triumph of a misguided cause is that good people do nothing.”One such cause now seeks to end biomedical research be...
A.
call on scientists to take some actions.
B.
criticize the misguided cause of animal rights.
C.
warn of the doom of biomedical research.
D.
show the triumph of the animal rights movement.
【单选题】To paraphrase 18th-century statesman Edmund Burke, 'all that is needed for the triumph of a misguided cause is that good people do nothing.' One such cause now seeks to end biomedical research because...
A.
call on scientists to take some actions
B.
criticize the misguided cause of animal rights
C.
warn of the doom of biomedical research
D.
show the triumph of the animal rights movement
【多选题】关于地毯施工质量的说法，正确的有（ ）。
A.
拼缝处应粘贴牢固、严密平整、图案吻合
B.
不应起鼓、起皱、翘边、卷边
C.
绒面毛应顺光一致，不应明显拼缝、露线和毛边
D.
毯面应洁净、无污染和损伤
E.
同其他面层连接处、收口处必须用不锈钢条压紧
【多选题】Please choose synonyms of paraphrase .
A.
explain
B.
demonstrate
C.
account for
D.
interpret
【单选题】To paraphrase 18th-century statesman Edmund Burke, 'all that is needed for the triumph of a misguided cause is that good people do nothing'. One such cause now seeks to end biomedical research because...
A.
call on scientists to take some actions
B.
criticize the misguided cause of animal rights
C.
warn of the doom of biomedical research
D.
show the triumph of the animal rights movement
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