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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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】按照量子力学理论,氢原子中的电子绕核运动时,电子的动量矩L的可能值为
A.
lh/2π， l=0,1,2,3......(n-1)
B.
l=0,1,2,3......(n-1)
C.
2πnh, l=1,2,3.......
D.
nh/2π, l=1,2,3......
【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！