下列各字简化有误的是( )。
A.嚴→严
B.廬→庐
C.擀→扞
D.機→机
参考答案:C
The traffic is heavy these days. I ____ arrive a bit late, so could you save me a place?[ ]
A. can
B. must
C. need
D. might
滑动轴承的润滑剂一般采用()。
A.锂基脂
B.钙基脂
C.二硫化钼
D.钠基脂