肾炎综合征表现有()
A.血尿
B.高血压
C.两者都有
D.两者都无
参考答案:C
A.It can only alert the police.
B.It is of no use.
C.It can prevent the car being broken into.
D.It is really too expensive.
变速器由变速()和变速操纵机构组成。
A.动力机构
B.机械机构
C.传动机构
D.液力机构