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【单选题】
1已知一高斯面所包围的体积内电量代数和 ,则可肯定:
A.
面上各点场强均为零;
B.
穿过面上每一面元的电通量均为零;
C.
穿过整个面的电通量为零;
D.
以上说法都不对。
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参考答案:
举一反三
【单选题】Reginald is the manager of production department M in a factory which has ten other production departments. He receives monthly information that compares planned and actual expenditure for department ...
A.
A revenue centre manager
B.
A cost centre manager
C.
An investment centre manager
D.
A profit centre manager
【判断题】在二手车技术鉴定时,要分清主次,凡对二手车价值构成影响的缺陷,都应认真检查和评判,但对评估价值不构成影响的细微瑕疵,就不要去斤斤计较。
A.
正确
B.
错误
【多选题】如有乘客被困在电梯轿箱内,作为站务人员,以下做法正确的是( )。
A.
安抚乘客
B.
配合专业人员进行救援
C.
直接打开电梯轿门对乘客进行救援
D.
等待专业救援人员进行维修和救援
【判断题】在二手车技术鉴定时,要分清主次,凡对二手车价值构成影响的缺陷,都应认真检查和评判,但对评估价值不构成影响的细微瑕疵,就不要去斤斤计较。
A.
正确
B.
错误
【单选题】材料是实现家具形态的( ),是构成家具功能的物质要素
A.
物质形态
B.
造型手段
C.
实体形态
D.
物质手段
【单选题】Reginald is the manager of production department M in a factory which has ten other production departments. He receives monthly information that compares planned and actual expenditure for department ...
A.
A cost centre manager
B.
An investment centre manager
C.
A profit centre manager
D.
A revenue centre manager
【判断题】零件图中,应尽可能多地绘制多个视图,力求表示清晰。
A.
正确
B.
错误
【单选题】Reginald is the manager of production department M in a factory which has ten other production departments. He receives monthly information that compares planned and actual expenditure for department ...
A.
A cost centre manager
B.
An investment centre manager
C.
A profit centre manager
D.
A revenue centre manager
【判断题】在二手车技术鉴定时,要分清主次,凡对二手车价值构成影响的缺陷,都应认真检查和评判,但对评估价值不构成影响的细微瑕疵,就不要去斤斤计较。
A.
正确
B.
错误
【单选题】Reginald is the manager of production department M in a factory, which has ten other production departments. He receives monthly information that compares planned and actual expenditure for department...
A.
A cost centre manager
B.
An investment centre manager
C.
A profit centre manager
D.
A revenue centre manager
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