补偿导线的绝缘层负极颜色:SC或SR是(),K是(),E是(),T是()。
A.蓝;绿;白;棕
B.绿;蓝;棕;白
C.棕;蓝;绿;白
D.白;绿;蓝;棕
参考答案:B
甲、乙两人做的功之比为4:3,所需时间之比为2:5,则甲、乙两人做功的功率之比为______.
Last week I bought a flat()biggest room faced south.
A.that
B.whose
C.which
D.where