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【单选题】
下列哪一个操作系统不是微软公司开发的操作系统?
A.
windows server
B.
 win7
C.
 linux
D.
 vista
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参考答案:
举一反三
【单选题】After the school sports, our headmaster ______ the prizes.
A.
gave away
B.
gave in
C.
gave off
D.
gave up
【单选题】Your body language _____ your real emotion.
A.
gave in
B.
gave up
C.
gave away
D.
gave out
【单选题】生物膜的功能主要决定于( )。
A.
膜的结合水
B.
糖类
C.
膜脂
D.
膜蛋白
【单选题】降低电源电压调速机械特性硬度( ),调速平滑性好,损耗较小,投资较大。不变
A.
变大
B.
变小
C.
不变
D.
变化
【单选题】要使他励直流电动机调速时保持原来的机械特性硬度,则应采用( )
A.
电枢回路串电阻
B.
降低电源电压
C.
减弱磁通
D.
增大磁通
【判断题】降低电源电压调速前后机械特性的斜率不变,硬度较高,负载变化时,速度稳定性好。
A.
正确
B.
错误
【单选题】降低电源电压调速机械特性硬度( ),调速平滑性好,损耗较小,投资较大。
A.
变大
B.
变小
C.
不变
D.
变化
【单选题】What does the woman mean?
A.
She wants the man to buy it.
B.
She wants to buy it.
C.
She doesn't want to buy it.
【单选题】When he opened the box, it ____________ a bad smell.
A.
gave away
B.
gave in
C.
gave out
D.
gave up
【单选题】What does the woman mean?
A.
She wants a drink.
B.
She doesn't want a drink.
C.
She wants to give the man a drink.
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