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【判断题】
运输层的端口号分为两大类,一类是服务器端使用的端口号,包括熟知端口号、登记端口号,另一类是客户端使用的临时端口号。A.
正确
B.
错误
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举一反三
【单选题】Read the following passage and tell if the statements are true, false or not given. Holiday home When we went on holiday last year to a small town near London, my father knew all the landmarks. He kne...
A.
T
B.
F
C.
Not given
D.
N/A
【单选题】—Why did Miss Wang look so worried when we saw her? —Because she wondered .
A.
where did the other students go
B.
when would the policeman come
C.
if her students had survived the earthquake
D.
what she will do during the trip
【单选题】已知挡土墙高4.5m，墙背直立、光滑，墙后填土为砂土并与墙顶齐平，c=0，φ=30°，γ=18kN/m 3 ，γ′=9kN/m 3 ，地下水位位于墙顶，则距墙顶深度4m处的主动土压力强度为（）。
A.
18.0kPa
B.
10.8kPa
C.
12.0kPa
D.
16.1kPa
【简答题】The holiday was a(n) ____________ (forget) experience.A. unforgettable
【简答题】三极管放大区,当管子的Ib为10μA时,Ic约为1mA,由此管子的β值约是( )
【单选题】Stephen Bona was on holiday when he saw a huge and gray shark leap out of the water at the sea.
A.
Y
B.
N
C.
NG
【简答题】The holiday was a(n)___(forget)experience.
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