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For practical purposes, in a simple series circuit, the sour

题目
单选题
For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has（）.
A

half the resistance of the other resistor

B

a resistance equal to the other

C

at least ten times the resistance of the other

D

a partial short circuit

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相似问题和答案

第1题：

A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.

A.can be reset to energize the circuit

B.should open the circuit when overloaded

C.will burn out when an over current flow develops

D.should short the circuit when overloaded


正确答案：B

第2题：

A circuit breaker differs from a fuse in that a circuit breaker ______.

A.melts and must be replaced

B.is enclosed in a tube of insulating material with metal ferrules(环) at each end

C.gives no visual indication of having opened the circuit

D.trips to break the circuit and may be reset


正确答案：D

第3题：

What can be said about the experiments at Rocky Mountain Arsenal?

A) They have no practical value in earthquake prevention.

B) They may have practical value in earthquake prevention.

C) They are certain to have practical value in earthquake prevention.

D) The article does not say anything about their practical value in earthquake prevention.


正确答案：D
答案：D
[试题分析] 推断题。
[详细解答] 根据上一题，知道了研究experiments at Rocky Mountain Arsenal的意义，显然可判断：They may have practical value in earthquake prevention，因此，答案为B。

第4题：

On an ONS 15454 node you can tunnel a（n） （）.

  • A、 SDH circuit over a SONET network delivering it as an SDH signal
  • B、 SDH circuit over a SONET network delivering it as a SONET signal
  • C、 SONET circuit over an SDH network delivering it as an SDH signal
  • D、 SONET circuit over an SDH network delivering it as a SONET signal

正确答案:A

第5题：


The author suggests that the approach of physicists to solving scientific problems is which of the following？( )

A.Practical for scientific purposes
B.Detrimental to scientific progress
C.Unimportant in most situations
D.Expedient，but of lttle long-term value

答案：A
解析：

第6题：

A circuit breaker and a fuse have a basic similarity in that they both______.

A.can be reset to energize the circuit

B.should open the circuit when overloaded

C.will burn out when an over current flow develops

D.should short the circuit when overloaded


正确答案：B

第7题：


The author suggests that the approach of physicists to solving scientific problems is which of the following？( )

A.Practical for scientific purposes.
B.Detrimental to scientific progress.
C.Unimportant in most situations.
D.Expedient，but of lttle long-term value.

答案：A
解析：

第8题：

WhichCiscoCatalystswitchesfitintheaccessarea?()

A.CiscoCatalyst2900Series，Catalyst7300Series，andCatalyst8000Series

B.CiscoCatalyst2900Series，Catalyst3700Series，andCatalystSeries

C.CiscoCatalyst2700Series，Catalyst7300Series，andCatalyst8000Series

D.CiscoCatalyst2700Series，Catalyst3700Series，andCatalyst4500Series


参考答案：B

第9题：

Which three are optional extensions of the Frame Relay Local Management Interface specification？（）

  • A、switched virtual circuit
  • B、virtual circuit status
  • C、simple flow control
  • D、multicasting
  • E、permanent virtual circuit

正确答案:B,C,D

第10题：

活性污泥的比耗氧速率（SOUR）


正确答案: 单位重量的活性污泥在单位时间内所能消耗的溶解氧量。单位为mgO2/（gMLVSS·h）或mgO2/（gMLSS·h）。

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