一个角的补角是它的余角的度数的3倍,则这个角的度数是多少?
设这个角的度数是x,
则180°-x=3(90°-x),
解得x=45°.
答:这个角的度数是45°.
在传染病区内属于清洁区的是()
A.治疗室
B.检验室
C.消毒室
D.病房
E.病区走廊
_______it rain tomorrow,we would have to put off the visit to the new bridge. [ ]
A. Were
B. Should
C. Had
D. Would