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【单选题】
以下关于TCP报头中“序号”的描述中,错误的是A.
序号字段长度为32bit
B.
序号范围在0~4284967295
C.
TCP发送的字节流中每个字节按顺序编号
D.
TCP连接建立时通信双方要协商一个序号
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举一反三
【单选题】According to Obamas 2011 blueprint, how long would it take for illegal immigrants to gain citizenship?
A.
Eight years.
B.
Five years.
C.
Thirteen years.
D.
Eleven years.
【单选题】According to this passage, how long would the computer be down?
A.
For 10 minutes.
B.
Between 10 minutes and 2 hours.
C.
It would be down for two hours.
D.
It wasn’t clear.
【简答题】制造子弹弹壳通常采用H70,请说明H70牌号的含义,H70最突出的性能是什么?
【简答题】Knowing how long the test would last, the students who finished ____ back and waited until the end of the exam. A．settle B．settled C．settling D．to settle
【单选题】已知总体X的分布为P{X=i} = 1/4，i= 0，1，2，3，抽取n= 36的简单随机样本X1，X2，...，X36，则E(X),D(X)分别为（ ）.
A.
1.5 ，1.25
B.
1.25 ，1.5
C.
1.35 ，2.0
D.
2.0 ，1.35
【简答题】制造子弹弹壳通常采用H70,请说明H70牌号的含义,H70最突出的性能是什么?
【单选题】已知总体X的分布为P{X = i} = 1/4，i = 0，1，2，3，抽取n = 36的简单随机样本X1，X2，...，X36，则E(X), D(X)分别为（ ）.
A.
36 ， 54
B.
45 ， 54
C.
54 ， 36
D.
54 ， 45
【单选题】According to the passage, how long does it take for a would-be physician to become an independent physician in the USA?
A.
About seven years.
B.
Eight years.
C.
Ten years.
D.
About twelve years.
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