A.水源
B. 储水和供水设备
C. 水处理设备
D. 灌溉和施肥设备
E. 田间网络F . F、灌水器
In Weldon Spring, people found ______.
A.chemicals in well Water
B.many sources of surface water
C.more aquifers than other places
D.chemicals in the bomb factory
A.Many sources of surface water have been found.
B.Chemicals were found in the water.
C.A growing population need more clean water in that place.
D.A bomb factory will be built there.
According to many sources, the safest drinking water is from a piped supply.
A.many resources
B.a great deal of information
C.many sausages
D.a great deal of salvage
A.brave
B.doubtful
C.quiet
D.careful
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