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【单选题】
有关IEEE802.11b标准描述错误的是（）。A.
可以支持最高为11Mbps的数据速率。
B.
运行在2.4GHz的ISM频段上。
C.
最多可以提供12个互不重叠的子频道。
D.
采用补码键控调制技术CCK
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举一反三
【单选题】The number of the people who _____ cars _____increasing.
A.
owns,are
B.
owns,is
C.
own,is
D.
own,are
【单选题】Once in Paris, I some time with a good friend who had moved to live there for six months.
A.
cost
B.
paid
C.
took
D.
spent
【简答题】I never wanted a dog, but now I'm so glad I have one. About two years ago, my wife, Cathy, got a little dog with a face only a mother could love. We named her Gertie. Gertie is the kind of dog that ha...
【简答题】补全对话，根据对话内容，在空白处填上适当的句子。 A: Haven't seen you for months, Hans! B: Oh, Nancy! It's you! Yes, 1 A: England? For what? B: 2 A: I thought you were traveling or visiting your relatives. 3 B: I mainly staye...
【简答题】阅读理解。 I never wanted a dog, but now I'm so glad I have one. About one year ago, my wife, Mary, got a little dog with a face only a mother could love. We named her Baby. Baby is the kind of dog that ha...
【单选题】In our country, the number of people who __________ cars increasing. [ ]
A.
owns; are
B.
owns; is
C.
own; is
D.
own; are
【简答题】As a young child, I was quiet and shy. I was also sick for a long time. My parents worked, and I spent a lot of time at my grandparent’s home. While my grandmother cleaned the house and cooked, my gra...
【单选题】Once in Paris, I some time with a good friend who had moved to live there for six months.
A.
cost
B.
pay
C.
took
D.
spent
【判断题】when the parent owns over 50% of the voting power of an entity ,control can be assumed
A.
正确
B.
错误
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