耕地承包区为().
A.40年
B.30年
C.10年
参考答案:B
.The sweater ________ easily; isn't it suitable for a person as lazy as you?
A.is washed
B.was washed
C.washes
D.has washed
零序后加速要带延时,延时多少()
A、100ms
B、200ms
C、60ms
D、150ms