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若检修设备属于同一电压等级、位于同一楼层、同时停送电。且工作人员不会触及带电导体时，则在几个电气连接部分（）。

A. 可以共用一张工作票
B. 必须使用两张工作票
C. 有几个电气连接部分，必须使用几张工作票

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通信子网可分为点—点通信线路通信子网与广播信道通信子网两类。()

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The passage contains information that would answer which of the following questions？ I . What techniques have industrialists used to manipulate a free market？ II . In what ways are "New World" and " Old World " economic policies similar？ III. Has economic policy in the United States tended to reward independent action？

A. I only
B. II only
C. III only
D. I and II only
E. II and III only

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是()。

A. 液上喷射中倍数泡沫灭火系统
B. 液下喷射低倍数泡沫灭火系统
C. 液上喷射低倍数泡沫灭火系统
D. 液下喷射中倍数泡沫灭火系统

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The passage suggests which of the following about the workers who took temporary jobs during the 1980s？

A. Their jobs frequently led to permanent positions within firms.
B. They constituted a less demographically diverse group than has been suggested.
C. They were occasionally involved in actions organized by labor unions.
D. Their pay declined during the decade in comparison with the pay of permanent employees.
E. They did not necessarily prefer temporary employment to permanent employment .

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若检修设备属于同一电压等级、位于同一楼层、同时停送电。且工作人员不会触及带电导体时，则在几个电气连接部分（）。

A. 可以共用一张工作票 B. 必须使用两张工作票 C. 有几个电气连接部分，必须使用几张工作票

通信子网可分为点—点通信线路通信子网与广播信道通信子网两类。()

是()。

The passage suggests which of the following about the workers who took temporary jobs during the 1980s？

A. 可以共用一张工作票
B. 必须使用两张工作票
C. 有几个电气连接部分，必须使用几张工作票