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【简答题】
1831年,英国著名物理学家 发现了电磁感应现象,导致了 的发明,开创了人类用电的新纪元。 8.当你唱卡拉OK时,要用到话筒,话筒的种类很多,右图是动圈式话筒构造的示意图。当你对着话筒说话或唱歌时,产生的声音使膜片 ,与膜片相连的线圈也跟着一起 ,线圈在磁场中的这种运动,能产生随着声音的变化而变化的 ,经放大后,通过扬声器还原成声音。
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举一反三
【单选题】The reason why the car was stopped was () .
A.
that the road was slippery
B.
due to the slippery road
C.
because the road was slippery
D.
because of the slippery road
【单选题】Not long after the telephone was invented. I assume, a call was placed. The caller was a parent saying，“Your child is bullying my child, and I want it stopped!”The bully's parent replied，“You must hav...
A.
frightening and hurting
B.
teasing
C.
behaving 1ike a tyrant
D.
laughing at
【单选题】Not long after the telephone was invented, I assume, a call was placed. The caller was a parent saying, 'Your child is bullying my child, and I want it stopped!' The bully's parent replied. 'You must ...
A.
frightening and hurting
B.
teasing
C.
behaving like a tyrant
D.
laughing at
【简答题】A．The customer was very rude but the waitress was not. B．The waitress was very rude but the customer was not. C．The waitress shouted at the customer. D．The customer and the waitress had a quarrel.
【单选题】Why was the Stuyvesant a limited success?
A.
The arrangement of the rooms was not convenient.
B.
Most people could not afford to live there.
C.
There were no shopping areas nearby.
D.
It was in a crowded neighborhood.
【单选题】The minister headed the committee.
A.
was on the verge of
B.
was on the basis of
C.
was at the cost of
D.
was in charge of
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