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【单选题】
被广大国内JS开发者誉为“Web前端开发神器”,且是jetbrains公司旗下的一款JavaScript 开发工具的是( )。A.
HBuilder
B.
WebStorm
C.
Nodepad++
D.
sublime text3
拍照语音搜题，微信中搜索"皮皮学"使用
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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】路由器上如何将当前运行的配置保存下来?
A.
write startup-config
B.
copy running-config startup-config
C.
write running-config
D.
copy running-config flash
【简答题】一平板电容器的电极面积A=0.05m 2 ，电极间的距离d=5mm，两极电压为U=200V，计算电极上的电荷、电容器的储能以及电极之间的作用力。
【多选题】Which of the following statement about concepts concerning sampling is/are true?
A.
Sample refers to a number of people taken from a larger group (i.e., population) and used to provide the information about the entire group.
B.
Sampling refers to the process of drawing a sample from a large research population.
C.
Census refers to procedure of systematically collecting information from every member of a given population.
D.
Sampling is the method used when the size of the population would render a census unfeasible and/or unnecessary.
E.
Representativeness means the extent to which the data obtained from the sample are true with the target population.
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