上颌第一磨牙近中颊尖离开平牙合面（）
A.0mm
B.0.5mm
C.1.0mm
D.1.5mm
E.2.0mm
参考答案：C
防护罩是起重机上十分重要的安全附件，它能有效防止操作人员和检修人员被：（）
A、击伤
B、擦伤
C、卷人
Peter _____ a little money every month so that he can buy a car of his own in the near future.[ ]
A. sets aside
B. sets about
C. sets off
D. sets out
