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计算题：通过测量某电动机电压为380V，电流为20A，试求电压、电流的最大值分别是多少？若电压超前电流30°，试写出电压、电流的瞬时值表达式设电源频率为50Hz，且电压初0°。
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【单选题】下列关于函数的说法错误的是（）
A.
C 语言函数不可以嵌套定义
B.
C 语言程序中的main()函数必须放在程序的开始部分
C.
函数间可以相互调用，但其他函数不可以调用main函数
D.
函数中定义的形参在函数未被调用时并不占用内存
【简答题】Is a mouse that can speak acceptable? How about a dog with human hands or feet? Scientists, the people with the know-how to make such things happen, are now thinking about whether such experiments are...
【单选题】This is ____ interesting story I have ever heard.A．by far moreB．by far the mostC．the most by far
A.
22. This is ____ interesting story I have ever heard. A．by far more
B.
by far the most
C.
the most by far
D.
the more by far
【单选题】Problems of the Elderly Gerontologists (老年人问题学者) study how old people are treated within a society and how the elderly deal with the inevitable problems of aging, particularly those involving health a...
A.
Gradual loss of hearing.
B.
Gradual loss of courage.
C.
Gradual loss of sight.
D.
Gradual loss of memory.
【简答题】How does the author view the Social Security system? A) It encourages elderly people to retire in time. B) It opens up broad career prospects for young people. C) It benefits the old at the expense of...
【简答题】给(马)装鞍具,装上马鞍,马鞍,(自行车、摩托车等的)车座
【单选题】下列关于函数调用的说法错误的是( )
A.
函数调用时需要给形参分配内存空间。
B.
函数调用时的参数传递指的是实参赋值给形参。
C.
通过return语句可以返回多个值给主调函数
D.
函数调用结束返回主调函数时形参所占的内存会释放出来。
【单选题】The passage provides information to answer .
A.
how the government will function
B.
where people would live
C.
what kinds of equipment will be manufactured in future
D.
how much the Life Net will cost
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