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【单选题】
二元合金在发生L→α+β共晶转变时，其相组成是？A.
液相
B.
三相共存
C.
单一固相
D.
两相共存
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皮皮学刷刷变学霸
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【单选题】万用表可以用来测量电流、电压、电阻等,也可以检测各种装置的电器故障,比如 : 检测熔丝,测量墙上插座的电压值,检测房顶上的天线,查明墙上的开关是否有了毛病,并完成许多其他家用电器的检修工作。
A.
With a multimeter, we can measure current, voltage ， resistance, etc. And we can also trouble-shoot appliances, test fuses, measure voltage at a wall outlet, check the wires from your roof antenna, find out whether a wall switch is broken, and perform dozens of other household jobs*. In troubleshooting, voltage can be measured while the set is on, and resistance can be measured while the set is off.
B.
With a multimeter, we can measure current, voltage ， resistance, etc. And we can also trouble-shoot appliances, test fuses, measure voltage at a wall outlet, In troubleshooting, voltage can be measured while the set is on, and resistance can be measured while the set is off.
C.
With a multimeter, we can measure current, voltage ， resistance, etc. And we can also trouble-shoot appliances, test fuses, measure voltage at a wall outlet, check the wires from your roof antenna, find out whether a wall switch is broken, and perform dozens of other household jobs
D.
With a multimeter, we can measure current, voltage ， resistance, etc. And we can also trouble-shoot appliances, test fuses, measure voltage at a wall outlet, check the wires from your roof antenna, find out whether a wall switch is broken, You get clues to the location of the trouble by comparing your multimeter readings with the normal values given in service manuals.
【简答题】康复工程技术产品的评估包括( )、( )、( )。
【单选题】世界上第一部大哥大手机售价50000元，如今一部全新大哥大手机的市场报价仅一百多元，造成这种巨大价值落差的原因是（ ）。
A.
功能性损耗
B.
折旧
C.
供给增加
D.
通货膨胀
【简答题】焊接变位机和机器人两者之间的运动大体可分为:__ __和__ __。
【单选题】第一部大哥大手机售价50000元，如今一部全新大哥大手机仅报价一百多元，造成这种巨大的价值落差的原因是（ ）。
A.
功能性损耗
B.
折旧
C.
供给增加
D.
通货膨胀
【单选题】We can trouble shoot appliances with a multimeter except ________.
A.
testing fuses
B.
measuring voltage in a wall outlet
C.
checking the wires of an antenna
D.
performing all of other testing jobs
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