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【单选题】
世界上最早建立失业保险制度的国家是( )。
A.
法国
B.
英国
C.
瑞典
D.
德国
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【简答题】Electric bicycles which run on battery-operated (电瓶) motors are winning over riders of ordinary bikes 41 their speed, quality and environmental advantage. They were first 42 on 1980s in China, but the...
【简答题】v There are various of engine such as electric motors, steam engines and internal combustion engines. However, the internal combustion engine seems to be the one most commonly used in the automotives ...
【单选题】计算机网络按照覆盖范围可分为 A 、城域网和广域网。
A.
局域网
B.
以太网
C.
通信网
D.
电话网
【简答题】As one of our s is interested in your electric motors, you are kindly requested to make us a firm ______ for 10 sets of the above mentioned goods for shipment in September.
【简答题】Belts are frequently necessary to reduce the higher rotative speeds of electric motors to the lower values required by mechanical equipment.
【简答题】There are various types of engines such as electric motors, steam engines, internal combustion engines and hybrid engines.
【简答题】计算机网络按照覆盖范围可分为哪几种?各有何特点?
【单选题】计算机网络按照覆盖范围可分为 () 、城域网和广域网。
A.
局域网
B.
以太网
C.
通讯网
D.
电话网
【单选题】反映观看广告而没有点击广告所产生的促销效果的指标是
A.
点击率
B.
转化率
C.
购买率
D.
供求率
【判断题】1332新买的联合收割机不需要进行磨合或试运转。
A.
正确
B.
错误
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