普通外啮合齿轮泵有()。
A.2只滚动轴承
B.4只滚动轴承
C.2只滑动轴承
D.4只滑动轴承
参考答案:B
治疗支饮脾肾阳弱证,宜选用()
A.肾气丸
B.苓甘五味姜辛汤
C.小半夏加茯苓汤
D.桂附理中汤
E.苓桂术甘汤
— ______ expensive mobile phone it is!
— Yes, but I think ______ style is quite fashionable.[ ]
A. What a; a
B. How; the
C. What an; the
D. How an; the