吹风机送风口与头发的夹角在()之间,热风斜指向外。
A.30—45度
B.45—60度
C.6—90度
D.9—10度
参考答案:B
干燥失重不得超过2.0%的剂型是()
A.气雾剂
B.颗粒剂
C.胶囊剂
D.软膏剂
E.膜剂
David likes _____ TV and _____ ping-pong. [ ]
A. watch; play
B. to watch; playing
C. watching; playing
D. watching; to play