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举一反三
【单选题】With more and more forests _____, many animals are facing the danger of dying out.
A.
to destroy
B.
destroying
C.
destroyed
D.
to be destroyed
【单选题】下面哪种方式不适合收取小额样品费( )
A.
WestUnion
B.
Paypal
C.
L/C
D.
MoneyGram
【单选题】IEEE 802.11g标准的物理层采用了扩频技术,工作在频段。
A.
600MHz
B.
800MHz
C.
2.4GHz
D.
19.2GHz
【单选题】下面哪种方式不适合收取小额样品费
A.
Money Gram
B.
L/C
C.
West Union
D.
Paypal
【简答题】完成句子 1. With more forests being destroyed,huge quantities of good earth________each year.(wash) 随着更多的森林被摧毁,每年都有大量的好土壤被冲走. 2. It was________I found we had a lot in common.(stay) 直到我们一起呆了几个星期我才发现我们有许多共同...
【单选题】无线局域网标准中即可工作在2.4G频段又可工作在5G频段的是( )。
A.
802.11a
B.
802.11b
C.
802.11g
D.
802.11n
【简答题】With more forests being destroyed, huge quantities of good earth ________ (be) being washed away each year.
【单选题】With more forests _____being destroyed, huge _____ of good earth _____ washed away each year.
A.
are ; number ; is
B.
/ ; quantities / are
C.
be ; number ; are
D.
/ ; quantities ;is
【单选题】UWB的DS-CDMA方案可以支持最多( )个Piconet同时工作,其中一半工作在低频段,另一半工作在高频段。
A.
6
B.
8
C.
10
D.
12
【简答题】工作在高频频段的射频前端采用 工作方式。A. 电感耦合
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