题目内容

6．A transistor is a semiconductor device used to（）electronic signals.

A. produce
B. amplify
C. reduce
D. switch

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7．In most applications, vacuum tubes have been replaced by（）and other semiconductor devices.

A. electron tubes
B. transistors
C. silicon
D. germanium

8．The most advanced（）are the microprocessors, which control everything from computers and cellular phones to digital microwave ovens.

A. semiconductors
B. wafers
C. transistors
D. integrated circuits

在()会议上,对全面推进国防和军队现代化作出新的战略安排。

A. 中共十八大
B. 中共十九大
C. 中共十七大

引领军队发展的第一动力是()

A. 党的绝对领导
B. 改革
C. 创新