问题
单项选择题
三相负载有功功率的表达式为()
A、P=UIcosφ;
B、P=Scosφ;
C、P=UIcosφ;
D、cosφ=P/S
答案
参考答案:C
三相负载有功功率的表达式为()
A、P=UIcosφ;
B、P=Scosφ;
C、P=UIcosφ;
D、cosφ=P/S
参考答案:C
完形填空。 | ||||
My name is Peter. I 1 in Canada. I am 1.7 meters 2 . I 3 a big nose and two big blue 4 . My 5 is brown and curly (卷曲的). I like to draw 6 markers and sing songs. I like white. It is my 7 colour. I have many white clothes. Today I'm 8 a white shirt and white pants. I have a friend. 9 name is Bill. We often play together (一起). We like the same colour and we like to 10 the same food. | ||||
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