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【单选题】
被誉为现代计算机之父的是A.
冯.
B.
图灵
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皮皮学刷刷变学霸
举一反三
【简答题】What did he suggest besides the area sales survey? To make __________.
【单选题】三相动力供电线路中的电压是380V,则任意两根相线之间的电压称为 ( )。
A.
相电压 有效值为380V
B.
线电压 有效值为220V
C.
线电压 有效值为380V
D.
相电压 有效值为220V
【单选题】What are the advantages of the prevalence survey study?
A.
The cause of the disease can be determined.
B.
A variety of factors can be measured in an investigation.
C.
The sample size is relatively small in the sampling survey.
D.
There is less bias in the investigation.
【单选题】What are the advantages of the prevalence survey study?
A.
The sample size is relatively small in the sampling survey.
B.
The cause of the disease can be determined
C.
A variety of factors can be measured in an investigation.
D.
There is less bias in the investigation.
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