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【单选题】
在一天中,至少组织幼儿饮水( )次,还要允许幼儿根据自身需要随意喝水A.
1
B.
2
C.
3
D.
4
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A.
call 120 at once
B.
ask the guest to go to the hotel and have a rest at first
C.
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A.
虽可节水，但难以完全避免输水损失和深层渗漏损失
B.
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C.
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D.
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