单项选择题

A.
2 B.
C.
D.

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单项选择题

How was Mr. Holland’s teaching the first day in school?

A． It was very successful.
B． Students liked him very much.
C． He felt frustrated by the bad performance of the students.
D． He was very satisfied with the performance of the students.

多项选择题

直接法人工补给地下水可分为（）。
A. 地表入渗补给法

B. 诱导补给法

C. 井内灌注渗水补给

D. 直接灌注法