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【单选题】
我国使用的工频交流电频率为( )Hz。A.
45
B.
60
C.
50
D.
80
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】( )方法可以清除Form或PictureBox中由Print方法和图形方法在运行时所生成的文本或图形
【单选题】预付资本总周转速度是指（ ）。
A.
全部预付固定资本和流动资本的周转
B.
部分预付固定资本和全部流动资本的周转
C.
部分预付流动资本和全部固定资本的周转
D.
预付资本不同组成部分和平均周转
【单选题】What is David going to do in winter holiday?
A.
He is going to Zhengzhou.
B.
He is going to spend several days with his uncle.
C.
He has no idea.
D.
He plans to go to New York.
【单选题】What is David going to do?
A.
Catch a train home.
B.
Do his homework.
C.
Go to a park.
【单选题】What is David going to do first?
A.
To go boating.
B.
To do his homework.
C.
To go for a walk.
【简答题】What is David going to do? [ A] Catch a train home. [ B ] Do his homework. [C]Go to a park.
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