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题目内容
（山东理工大学英语2）
What have scientists achieved in dealing with floods?
（4分）
AThey have prevented many rivers from flooding.
B
They have reduced the damage caused by floods.
C
They have learned much about conditions for flooding.
DThey have found most of the ice dams on the river.
（4分）
AThey have prevented many rivers from flooding.
B
They have reduced the damage caused by floods.
C
They have learned much about conditions for flooding.
DThey have found most of the ice dams on the river.
参考答案