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【单选题】
经饮用水传播的传染病的流行特征不包括A.
病例分布与供水范围一致，有饮用同一水源史
B.
除哺乳婴儿外，无职业、年龄及性别差异
C.
发病有地区、季节及职业分布特点
D.
如水源经常受污染则病例长期不断
E.
停用污染水源或采取消毒、净化措施后，暴发或流行即可平息
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The admittance Y for a parallel LC circuit at resonance is:
A.
0
B.
C.
D.
none of the above
【简答题】Mr. Cronin has a clock shop in the center of the town. He tries his best to 36 it well. He often receives the customers(顾客) 37 and people like to buy 38 in his shop. It was a cold day and 39 people wo...
【判断题】when LC parallel reasonant circuit working frequency bigger than the reasonance frequency, the whole circuit is inductive
A.
正确
B.
错误
【简答题】What will happen when the load is connected directly to the LC parallel resonant circuit?
【简答题】What will happen when the load is connected directly to the LC parallel resonant circuit? (可用中文或者英文回答)
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