题目内容

1.We count on first responders to rush toward danger, especially when it involves us or those we love.2.Most characters in his movies are somewhat larger- than-life.3.He spent 3 years in jail for drug possession.4.During the rain storms in the spring and fall, I was confined to the house all day.5.The construction team found a burial chamber of thousands of years history.6.There is a strong need to establish effective communication links between staff, parents, pupils, and external bodies.7.We must ensure that tourism develops in harmony with the environment.

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A. 各半调节法
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已知一高斯面所包围的体积内电量代数和为零,则可以肯定的是 [ ]

A. 高斯面上各点场强均为零;
B. 穿过高斯面上每一面元的电通量均为零;
C. 穿过整个高斯面的电通量为零;
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静电场中某点电势的数值等于 [ ]

A. 试验电荷q0置于该点时具有的电势能;
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C. 单位正电荷置于该点时具有的电势能;
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