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【单选题】
下列关于各种非屏蔽双绞线(UTP)的描述中,错误的是(20)。
A.
超5类双绞线的带宽可以达到100MHz
B.
5类双绞线的特性阻抗为100Ω
C.
6类、7类双绞线的连接方式与目前的RJ—45接头相兼容
D.
6类双绞线的带宽可以达到200MHz
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举一反三
【简答题】Passage Three:Questions 31 to 35 are based on the following passage.“... We are not about to enter the Information Age but instead are rather well into it.” Present predictions are that by 1990, about...
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A.
体系>大气压
B.
体系<大气压
C.
体系=大气压
D.
无法判断
【单选题】Duty is an act or a course of action that people _______ you to take to by social customs,law or religion. [     ]
A.
persuade
B.
request
C.
instruct
D.
expect
【判断题】太阳照到森林里,在地上形成斑斑驳驳的圆形光斑是太阳的虚像
A.
正确
B.
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【单选题】【C15】
A.
As regards to
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In regards
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With regard
【简答题】[A] activity [B] action [C] act [D] acting
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A.
体系>大气压
B.
体系<大气压
C.
体系=大气压
D.
无关系
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A.
an old watch
B.
two friends
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D.
Both B and C
【单选题】【C1】
A.
As regards to
B.
Regardless of
C.
With regard to
D.
In regard to
【单选题】【31】
A.
for example
B.
that is
C.
as we know
D.
and so on
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