隐形义齿卡环的厚度为()
A.0.5~0.8mm
B.0.8~1.0mm
C.1.0~1.5mm
D.1.5~2.0mm
E.2.0~2.5mm
参考答案:D
—_____ you speak Japanese?
—No, I can't. [ ]
A. Can
B. Must
C. May
D. Should
五星级酒店咖啡厅的营业时间应不少于()
A.10小时
B.12小时
C.16小时
D.18小时