选择刀具起始点时应考虑()。
A、防止与工件或夹具干涉碰撞
B、方便刀具安装测量
C、每把刀具刀尖在起始点重合
D、必须选在工件外侧
参考答案:A
8. The doctor insisted she____in bed. But her smiling face suggested there____nothing serious.
A.stay; was
B.stayed; was
C.would stay; be
D.stay; be
土地:农民
A.资本:商人 B.药方:医生C.晚会:歌手 D.课本:教师