变压器有哪几种故障()。
A.绕组故障
B.套管故障
C.分接开关故障
D.铁芯故障
参考答案:A, B, C, D
英汉互译。
1. 三只黄色的椅子 ___________________
2. It's red. ___________________
3. one yelow desk ___________________
4. five blue books ___________________
5. Colour it blue. ___________________
6. four green pencils ___________________
-----How’s it ________ ? ------Great.
A.go
B.going
C.goes
D.went