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【多选题】
.下列各项中,属于企业编制记账凭证依据的有( )。
A.
汇总原始凭证
B.
汇总记账凭证
C.
原始凭证
D.
科目汇总表
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【简答题】A transformer(变压器) is a device based upon this effect which is used to change the voltage(电压) in an ac circuit(交流电路) from one value to another.
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【单选题】预期股价上涨而买入股票,结果股价却下跌,又不甘心将股票卖出,被动等待获利时机的出现。这种情况情况称为
A.
短多
B.
斩仓
C.
套牢
D.
踏空
查看完整题目与答案
【单选题】The excitation resistance of the transformer is an equivalent resistance reflecting ( ).
A.
total loss
B.
short-circuit loss
C.
iron loss
D.
secondary winding loss
查看完整题目与答案
【单选题】Based on the principle of electromagnetic induction, the fundamental method to realize voltage transformation in a transformer is that ( ).
A.
the number of turns of the primary and secondary winding is the same
B.
the number of turns of the primary and secondary winding is different
C.
there is an electrical connection between the primary and secondary winding
D.
the primary and secondary windings are insulated from each other
查看完整题目与答案
【单选题】随动系统要求系统的输出信号能跟随:
A.
反馈信号的变化
B.
干扰信号的变化
C.
输入信号的变化
D.
偏差信号的变化
查看完整题目与答案
【单选题】What is NOT tree about genes in the process of genetic modification?
A.
Genes interact with one another.
B.
Normal genes may be damaged in the process.
C.
The transferred gene may have different functions in different organisms.
D.
The transferred trait controlled by one gene can be transferred endlessly.
查看完整题目与答案
【判断题】套牢是指预期股价上涨而买入股票，结果股价却下跌，又不甘心将股票卖出，被动等待获利时机的出现。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A transformer is a device that can converter one ac voltage to another ac voltage through the action of () .
A.
an electric circuit
B.
a magnetic field
C.
an electric field
D.
a coupling circuit
查看完整题目与答案
【单选题】随动系统要求系统的输出信号能跟随:
A.
反馈信号的变化
B.
干扰信号的变化
C.
输入信号的变化
D.
模拟信号的变化
查看完整题目与答案
【简答题】A 15-kVA 7000/230-V distribution transformer has an impedance referred to the primary of 80 + j300Ω. The components of the excitation branch referred to the primary side are Rc = 350 kΩ and Xm = 70 kΩ...
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相关题目：
【简答题】A transformer(变压器) is a device based upon this effect which is used to change the voltage(电压) in an ac circuit(交流电路) from one value to another.
查看完整题目与答案
【单选题】预期股价上涨而买入股票,结果股价却下跌,又不甘心将股票卖出,被动等待获利时机的出现。这种情况情况称为
A.
短多
B.
斩仓
C.
套牢
D.
踏空
查看完整题目与答案
【单选题】The excitation resistance of the transformer is an equivalent resistance reflecting ( ).
A.
total loss
B.
short-circuit loss
C.
iron loss
D.
secondary winding loss
查看完整题目与答案
【单选题】Based on the principle of electromagnetic induction, the fundamental method to realize voltage transformation in a transformer is that ( ).
A.
the number of turns of the primary and secondary winding is the same
B.
the number of turns of the primary and secondary winding is different
C.
there is an electrical connection between the primary and secondary winding
D.
the primary and secondary windings are insulated from each other
查看完整题目与答案
【单选题】随动系统要求系统的输出信号能跟随:
A.
反馈信号的变化
B.
干扰信号的变化
C.
输入信号的变化
D.
偏差信号的变化
查看完整题目与答案
【单选题】What is NOT tree about genes in the process of genetic modification?
A.
Genes interact with one another.
B.
Normal genes may be damaged in the process.
C.
The transferred gene may have different functions in different organisms.
D.
The transferred trait controlled by one gene can be transferred endlessly.
查看完整题目与答案
【判断题】套牢是指预期股价上涨而买入股票，结果股价却下跌，又不甘心将股票卖出，被动等待获利时机的出现。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A transformer is a device that can converter one ac voltage to another ac voltage through the action of () .
A.
an electric circuit
B.
a magnetic field
C.
an electric field
D.
a coupling circuit
查看完整题目与答案
【单选题】随动系统要求系统的输出信号能跟随:
A.
反馈信号的变化
B.
干扰信号的变化
C.
输入信号的变化
D.
模拟信号的变化
查看完整题目与答案
【简答题】A 15-kVA 7000/230-V distribution transformer has an impedance referred to the primary of 80 + j300Ω. The components of the excitation branch referred to the primary side are Rc = 350 kΩ and Xm = 70 kΩ...
查看完整题目与答案