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【简答题】
把交流电压变为直流电的过程叫()。
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【判断题】If you feel too uncomfortable or make too much of a mess eating with your fingers, feel free to ask for a spoon.
A.
正确
B.
错误
【简答题】A.Because she believed eggs were not very expensive and eating eggs could make her slim. B.Because she thought her heart was strong and eating too much protein could not hurt her heart. C.Because she ...
【简答题】Living healthy, live longer. just a few changes in your life style can help you live longer. A recent study found that four bad behaviors smoking, drinking too much alcohol, not exercising, and...
【简答题】Does Jack Ma often talk with the government? On what issues?
【单选题】关于CPM(关键路径法)的几种说法,()是正确的。 (1)CPM与PERT的根本不同点在于对活动时间T的计算 (2)关键路径代表了完成项目所花费的最长的时间 (3)一个项目中,可能会存在两条或更多的关键路径 (4)关键路径中的活动是最重要的 (5)关键路径表示的是最短路径
A.
(1)(2)
B.
(3)(4)
C.
(4)(5)
D.
(1)(3)
【多选题】变压器空载合闸或外部短路故障切除时,会产生励磁涌流,关于励磁涌流的说法正确的是()。
A.
励磁涌流总会在三相电流中出现
B.
励磁涌流在三相电流中至少在两相中出现
C.
励磁涌流在三相电流中可在一相电流中出现,也可在两相电流中出现,也可在三相电流中出现
D.
励磁涌流与变压器铁芯结构有关,不同铁芯结构的励磁涌流是不同的
E.
励磁涌流与变压器接线方式有关
【简答题】} 3. Saying that fast food ________ like McDonald’s should make their products healthier so that people will be consuming less junk food is ________. Can’t people just learn for themselves when they’r...
【单选题】Sara told us eating too much pizza ______her sick. [     ]
A.
let
B.
make
C.
want
D.
made
【单选题】关于家庭电路与安全用电,下列说法正确的是( )
A.
家庭电路中保险丝熔断,都是由于短路引起的
B.
照明用的灯与控制它的开关只需要串联即可
C.
保险丝被烧断后,可用铜丝代替保险丝接入电路
D.
发现家用电器或电线失火时,必须先切断电源后再救火
【单选题】The report points out that drinking too much alcohol ________.
A.
will also cause a person to get overweight
B.
will cause a person to do less sports
C.
will make a person forget the fact that he is fat
D.
will lead a person to bad eating habits
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