甲说:气门间隙会影响气门升程;乙说:气门间隙会影响气门持续开启角;试问谁正确?()
A.仅甲正确
B.仅乙正确
C.两人都正确
D.两人都不正确
参考答案:C
My toothache is killing me.I _____ it _____ away.But now it’s getting worse and worse.
A.think; is going
B.thought; was going
C.have thought; is going
D.had thought; had gone
把一条6米长的绳子平均分成7份,其中的第5段的长占全长的______,长度是______米.