皮皮学，免费搜题
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【单选题】
下列资料属于等级资料的是A.
红细胞计数
B.
门诊就诊人数
C.
患者的病情分级
D.
ABO血型
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】Children are used to the parties that consist of junk food, loud music and the like．However, today's environmental condition is serious, so to save our environment, we need to do our bit by sma...
【单选题】Their loud parties have recently caused a number of _____ from the other people in the building.
A.
compositions
B.
communications
C.
competitions
D.
complaints
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