下列不属于阿片类兴奋剂的是:()
A.冰毒
B.芬太尼
C.镇痛新
D.可待因
E.海洛因
参考答案:A
It took us ____ to finish the new work.
A. three hour and a half B. three and a half hour C. three and a half hours
不同的班级应有不同的作息制度。