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【简答题】
下列属于可再生能源的是( )。 A．风能 B．地热能 C．生物质能 D．水能
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举一反三
【单选题】—It's raining! When did it start? —I don't know exactly. In fact, it ______ all this afternoon. [ ]
A.
lasts
B.
has lasted
C.
lasted
D.
will last
【简答题】It’s to water the flowers
when it is raining.
【单选题】— It’s raining! When did it start? — I don’t know exactly. In fact, it _________ all this afternoon.
A.
lasts
B.
lasted
C.
has lasted
D.
will last
【单选题】When a pet dog eliminates in the house while it's raining hard, it ______.
A.
indeed takes a revenge on its owner
B.
is showing fear to the bad weather
C.
doesn't take a revenge on its owner
D.
wants the house to be as wet as the outside
【简答题】郝雷同学参观了科技馆后，一组静电实验给他留下了深刻的印象，回来后他把实验情景绘成一幅平面示意图，如图所示．图中A为放在绝缘支架上的带正电球体，B为用绝缘丝线悬吊的带正电的小球，先后将小球B悬吊在距离A球远近不同的P 1 、P 2 、P 3 处偏离情况． （1）小球偏离竖直方向的原因是什么？ （2）请你根据此图，提一个问题．
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