()的主要作用是传递转矩。
A.心轴
B.转轴
C.传动轴
参考答案:C
News reports say peace talks between the two countries have broken down ______ no agreement reached.
A.with
B.as
C.because
D.like
儿童一般在几岁之前居住于高氟区才会发生氟斑牙()
A.6~7岁
B.8~9岁
C.9~10岁
D.11岁
E.12岁