戒毒治疗药品是指控制并消除滥用下列哪类药品成瘾者的急剧戒断症状与体征的药品
A.大麻类B.可卡因类C.阿片类D.合成麻醉药品类E.精神药品类
参考答案:C
I think the watch is ______ of all. [ ]
A. nice
B. the much nicer
C. very nicest
D. the nicest
怎样进行油罐的切换?