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问题 单项选择题

少先队活动课与学校教育其他课程的关系是：（）。

A、缺一不可、互为补充

B、相辅相成、互为补充

C、相辅相成、缺一不可

D、互为补充、相辅相成

答案

参考答案：B

单项选择题

若企业产品的市场地位居中，所在行业吸引力一般，则应建议其采用（）.

A.重点投资战略

B.积极投资战略

C.维持现状战略

D.减少投资战略
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单项选择题

()in the strength of the carrier signal is varied to represent binary 1 or 0．______is a system that can map a name to an address and conversely an address to an name．______is a three-way handshaking authentication protocol that it’s packets are encapsulated in the point-to-point protocol______is an approach that enables an ATM Switch to behave like a LAN switch．______is an guided media which is made of glass or plastic and transmits signals in the form of light．

A．ASK 

B．PSK 

C．FSK

D．FDM
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