若塑件用点浇口进料，可选择（）注射成型模成型。
A.二板式
B.活动镶件式
C.三板式
D.二次顶出式
参考答案：C
作业活动的行为包括（）
A、环境范畴
B、社会心理技能
C、认知技能
D、时间范畴
E、ADL
______superstitious beliesfs about the mandrake plant.
A．People have had long
B．Have people long had
C．People have long had
D．Long have had people
