简述铜矿床的工业类型及其特征。
参考答案:
– James didn’t ____ last night, did he?
– No. He ____. We had changed our plan.
A.turn away; shouldn’t have come
B.turn up; needn’t have come
C.turn up; didn’t need to come
D.turn away; doesn’t need to come
胸腰差为14~18cm的女性体,根据国标是属于()。
A.Y体型
B.A体型
C.B体型
D.C体型