圆水准器轴的检验校正是为了满足( )。
A．L'L'∥CC
B．L'L'∥VV
C．LL∥VV
D．LL∥CC
参考答案：B
They often do some shopping on weekends. [ ]
A. sell things
B. work in the shop
C. buy things
D. have meals in the shop
蜂蜜的功效是（）
A.补中、缓急
B.润肺止咳
C.解毒
D.润肠通便
E.调和药性
