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电动牙刷 的商品编码( )
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举一反三
【简答题】信号是反映 _____ 的物理量,电信号是指随时间 ____ 而变化的电压或电流。
【简答题】打听,询问,调查,查问 n.
【单选题】在装入零件到装配体中时,第一个装入的零件会默认为固定。以下两个问题:这个固定零件可以改为可移动吗?其他的零件也可以设定为固定吗?
A.
可以,可以
B.
可以,不可以
C.
不可以,不可以
【单选题】Which of the following descriptions does not belong to the focus “being fashionable”?
A.
She looked tall, fair, and shapely.
B.
On each of her temples her hair, of a very dark brown, was clustered in round curls, according to the fashion of those times, when neither smooth bands nor long ringlets were in vogue.
C.
Her dress, also in the mode of the day, was of purple cloth, relieved by a sort of Spanish trimming of black velvet.
D.
A gold watch (watches were not so common then as now) shone at the girdle.
【单选题】Do did Jane feel at the thought of leaving Thornfield?
A.
As if she was dying.
B.
Relieved.
C.
Excited
D.
Worried.
【简答题】电信号指随时间而变化的 或 。
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