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【单选题】

()是制造光伏器件和微波器件及集成电路的重要材料。

A.
锑化锢
B.
磷化锢
C.
碳化硅
D.
砷化镓
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参考答案:
参考解析:
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【单选题】A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It is all translated to a fundamental change in the way we work. Already we've partly been...

A.
the service industry is relying more and more on the female work force
B.
manufacturing industries are steadily increasing
C.
people find it harder to earn a living by working in factories
D.
most of the job opportunities can now be found in service industry

【单选题】CD4028 集成电路是 ______________ 集成电路。

A.
十六进制/十进制译码器集成电路
B.
BCD/ 十进制译码器集成电路
C.
BCD/八进制译码器集成电路
D.
以上都错误!

【多选题】IC卡中的CPU卡集成电路中有()等部分。

A.
微处理器CPU
B.
随机存储器
C.
程序存储器
D.
用户数据存储器