用电流表测通过灯L1的电流强度,图所示的四个电路中,能测出灯L1电流的是( )

题型:选择题

问题:

用电流表测通过灯L1的电流强度,图所示的四个电路中,能测出灯L1电流的是(  )

A.

B.

C.

D.

考点:电流的测量,电流表的使用及读数方法
题型:选择题
阅读理解。
     In 1896, the first modern Olympic Games were held in Athens, Greece. Since then many countries
have held Olympics, such as England, France, Germany, Canada, the USA, Spain and Australia. After
more than a century the Games return to the hometown in 2004.
     When people hold the Olympic Games, they always make an emblem (会徽). The emblem of the
Athens Olympic Games in 2004 is a white olive branches in the sky.
     Athens developed a spirit of peace. An officer said, "While in Athens, the world should be at peace."
We hope the peace is not just for a short time. We would like the message from the Athens Games to
help countries come together and solve their problems. In 2008 the Olympic Games have been held in
China. And China has already made a seal as the emblem of the Beijing 2008 Olympic Games. The emblem
has a single Chinese character on a red seal and means "Chinese seal-dancing Beijing". Below it, there
are the words "Beijing 2008". The character in the emblem is "Jing". It means "Capital" of China and it
is also like a runner or a dancer. The running figure (人形) of the emblem shows the spirit of the
Olympics-faster, higher and stronger.
1. What do people always make when they hold the Olympic Games?
[ ]
A.A picture
B.An emblem
C.A flag
D.A map
2. What message does the Olympic Games want to give?
[ ]
A.War
B.Luck
C.Danger
D.Peace
3. How many years passed when Athens again held the Olympic Games?
[ ]
A.100
B.104
C.108
D.112
题型:选择题

暂换变压器的使用时间有何规定?

题型:选择题

当过度刃与进给方向平行,此时偏角к’γε=0°,该过渡刃称为().

A.修光刃

B.消振棱刃

C.锋刃

题型:选择题

谈一谈你对礼仪这一概念种种不同的殊途同归的解释?

题型:选择题

增加电冰箱重锤式启动器电感线圈的匝数后产生的结果是()。

A.吸合电流增大用于低压

B.吸合电流减小适用与高电压

C.吸合电流减小适用于低电压

D.吸合电流增大适用于高电压

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