Would you please send _____ a doctor?Myg_爱下问搜题

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问题选择题

Would you please send _____ a doctor?Mygrandfather is ill.[ ]

A. away

B. for

C. off

D. to

答案

B

选择题

— How is Emmy?

— I have no idea. She hasn't written to me ______ we met last time. [ ]

A. since

B. while

C. as

D. before

单项选择题

研究如何利用样本数据来推断总体特征的统计学方法是（）。

A.描述统计

B.推断统计

C.理论统计

D.应用统计