指出白云岩成因的错误说法()。
A.变质形成的
B.沉积形成的
C.岩浆形成的
参考答案:A
I think ______ at the train station will surprise Aunt Kate.
A.your being
B.you are
C.you were
D.you to be
i5T5.4智能车床两轴进给电机额定功率是多少?