直流配电屏中,其熔断器分容量应为负荷电流的2.5倍。
参考答案:对
用所给单词的适当形式填空。
1. Please give me two (apple).
2. The baby is ( sleep) now.
3. Can you find the (child) playing chess?
4. I love (go) hiking.
5. What (be) they doing?
下列运算正确的是( )
A.x6÷x3=x2
B.(x3)2=x5
C.(3xy)2=6x2y2
D.2x3y•xy=2x4y2