生活饮用水不得因回流而被污染,要求给水管配水出口高出用水设备溢流水位的最小空气间隙为______。
A.2.5mm
B.管径的2.5倍
C.2.5cm
D.100mm
参考答案:B
面瘫针刺按远道取穴常取()。
A.足三里
B.阳白
C.颊车、完骨
D.风池
E.合谷
In order to gain a bigger share in the international market, many staterun companies are ________to
make their products more competitive.[ ]
A. starving
B. struggling
C. playing
D. gathering