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【单选题】
平均负荷如何计算?( )A.
平均负荷可由用电设备的电能消耗量除以相应的时间间隔求得，也可由设备功率乘以利用系数算出
B.
在各个具体情况下，计算负荷分别代表有功功率、无功功率、视在功率、计算电流等，即计算负荷
C.
通常尖峰电流取或一组用电设备持续1s左右的最大负荷电流，即起动电流的周期分量；在校验瞬动元件时，还应考虑起动电流的非周期分量
D.
计算负荷一词，在广义上是本节所述各项的总称；在狭义上是指需要负荷或最大负荷
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举一反三
【单选题】The common input devices are the ( ) and the ( ).
A.
keyboard,printer
B.
keyboard,microphone
C.
mouse,monitor
D.
mouse,keyboard
【简答题】两片 74LS190 连接的计数电路如图所示。该电路实现( )进制计数器。(注:请填写阿拉伯数字)
【简答题】两片74LS190连接的计数电路如图所示。该电路实现（ ）进制计数器。【图片】
【单选题】____ about the man wearing sunglasses during night that he was determined to follow him．
A.
So curious the detective was
B.
So curious was the detective
C.
How curious was the detective
D.
How curious the detective was
【简答题】______ about “the God Particle” that Jude decided to search for as much information as possible about it. A. Such curious he was B. So curious he was C. So curious was he ...
【单选题】He was the new invention and asked the scientist about it over and over again. [ ]
A.
curious about
B.
angry with
C.
friendly to
D.
strict with
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