正确答案:
题目:同步卫星通信业务有卫星固定通信业务(FSS)和卫星移动通信业务(MSS)之分,MSS使用C频段和Ku频段,FSS使用L频段。()
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学习资料的答案和解析:
[单选题]下列选项中,不属于外存储器的是()。
ROM
[多选题]Some operating systems prefer a wireline ( ) over wireless because it is assumed to have more bandwidth and be more reliable, and some operating systems ( ) the user to define the preference order of the available interfaces.
link
connection
allowing
解析:C,A