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目前广泛使用的IP地址为IPv4,它是由()位二进制数组成,从理论上讲,IPv4可分配的IP地址数达到232即4294967296个,从IP地址刚诞生时,当时的网络规模来看,这么庞大的地址数量,在短时间内不可能分配完。

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32

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I am often asked to describe the experience of raising a child with a disability. It is like this. ___31___ you are going to have a baby, it’s like preparing a vacation trip to Italy. You ___32___ a bunch of guidebooks and make wonderful___ 33___ . You may learn some useful phrases ___34___ Italian. It’s all very exciting. ___35___ several months of eager expectation, the day finally ___36___ . You pack your bags and off you go. Several hours ___37___ , the plane lands in HollanD.“Why Holland?”you say, “I sign up ___38___ Italy! All my life I’ve dreamed ___39___ going to Italy.” But you have landed in Holland and___ 40___ you must stay.
The importance thing is to remember that they haven’t taken you ___41___ a horrible, disgusting, filthy placE.It’s just a ___42___ placE.So you go out and new guidebooks ___43___ you must learn a whole new languagE.Holland may be slower-paced ___44___ Italy. But you have been there for a while, you ___45___ that Holland has windmills and tulips(郁金香). Everyone you know is busy coming and going from Italy, and they all boasting about ___46___ a wonderful time they had therE.And for the ___47___ of your life you will say, “Yes, that’s where I was ___48___ to go”. But if you spend your life ___49___ the fact that you didn’t get to Italy, you may never be free to ___50___ the very special, the very lovely things about HollanD.
31__________
A.When
B.If
C.As
D.Before
32A.buy
B.write
C.pack
D.make
33A.trips
B.plans
C.tours
D.preparations
34A.for
B.of
C.in
D.to
35A.Before
B.Though
C.Through
D.After
36A.passes
B.arrives
C.ends
D.goes
37A.late
B.later
C.off
D.away
38A.for
B.in
C.at
D.as
39A.for
B.of
C.by
D.up
40A.where
B.on
C.there
D.then
41A.at
B.on
C.to
D.through
42A.different
B.new
C.familiar
D.wrong
43A.so
B.and
C.that
D.if
44A.as
B.by
C.in
D.than
45A.find
B.suppose
C.except
D.feel
46A.how
B.what
C.many
D.being
47A.rest
B.whole
C.better
D.more
48A.planned
B.supposed
C.expected
D.finding
49A.remembering
B.regretting
C.memorizing
D.finding
50A.get
B.have
C.see
D.enjoy
请帮忙给出每个问题的正确答案和分析,谢谢!
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