三(1)班参加美术小组的有14人,参加英语小组的有10人,两样都参加的有6人,两个小组一共有[ ]
A.20人
B.18人
C.24人
D.10人
答案:B
A good story does not necessarily have to have a happy ending, but the reader must not be left
.
A.unsatisfied
B.unsatisfying
C.to be unsatisfying
D.being unsatisfied
多轴加工的切削用量比一般万能机床单刀加工的切削用量约低______左右。
A.20%
B.30%
C.40%
D.50%