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【简答题】
物体间相互的 作用,这种作用使物体的 和 发生改变。力使物体的运动状态发生改变称为力的 ;
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参考答案:
举一反三
【单选题】IM0 环委会第 31 届会议决定将船舶的排放机舱污水的含油量不得超过 ______ppm 的规定扩大到所有航区。
A.
10
B.
12
C.
15
D.
100
【判断题】The increase dV results in an increase dI in the diode current. The dynamic or incremental resistance is rd = dV/dI.
A.
正确
B.
错误
【单选题】产生温室效应的主要物质是
A.
一氧化碳
B.
二氧化碳
C.
甲烷
D.
臭氧
【简答题】阅读理解。 Please look at the Flight Timetable and choose the right answers. (departure=leaving) 1. You'll go to Australia. You can only take _____ when you reach Beijing Airport at eleven forty. A .CA923 ...
【单选题】产生温室效应的主要物质是
A.
NO
B.
CO
C.
N O
D.
CO
E.
SO
【单选题】bat Please choose the right Chinese meaning.
A.
猴子
B.
蝙蝠
C.
果子狸
D.
松鼠
【判断题】A zener diode is a specially doped diode that operates the same as a regular diode in the forward-biased condition (it allows large current to flow).
A.
正确
B.
错误
【单选题】In a diode, current flows in ______ direction across the junction.
A.
only one
B.
two
C.
three
【判断题】A diode is a semiconductor that allows current to flow in any direction.
A.
正确
B.
错误
【单选题】The reverse saturation current of a diode will just about ( )for every 10°C rise in the diode temperature.
A.
double
B.
half
C.
increase proportionately with temperature
D.
decrease proportionately with temperature
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