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【单选题】
():热力过程顺时针方向,对外作功,>0,如内燃机循环A.
正循环
B.
翻
C.
冷笑话
D.
海鲇科
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【简答题】1) When I saw John in his room, he was busy _________ (prepare) his lessons. 2) I’d like to take this opportunity _________ (thank) all of you for coming to join us tonight. 3) My transistor radio isn...
【简答题】金属的 越好,则其锻造性能越好。
【单选题】以下有关“电场线”的描述,错误的是
A.
电场线起自正电荷，止于负电荷
B.
电场线在空间分布，可以相交
C.
电场线的疏密表示场强的大小
D.
电场线每一点的切线方向表示该点的场强方向
【简答题】Choose either the infinitive form or the –ing form of the verb in the brackets to complete each of the following sentences. (1)When I saw John in his room, he was busy (prepare) his lessons. (2)I’d li...
【简答题】1)When I saw John in his room, he was busy _________ (prepare) his lessons. 2)I’d like to take this opportunity _________ (thank) all of you for coming to join us tonight. 3)My transistor radio isn’t ...
相关题目：
【单选题】以下有关“电场线”的描述,错误的是
A.
电场线起自正电荷，止于负电荷
B.
电场线在空间分布，可以相交
C.
电场线的疏密表示场强的大小
D.
电场线每一点的切线方向表示该点的场强方向
参考解析：
知识点：
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