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【单选题】
如果子网掩码是255.255.255.128,主机地址为195.16.15.14,则在该子网掩码下最多可以容纳多少个主机A.
25
B.
126
C.
62
D.
30
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举一反三
【单选题】_____ is impossible _____one to do two things at one time. [ ]
A.
It; of
B.
It; for
C.
That; of
D.
This; for
【单选题】One of the most surprising things is that ____may come from petroleum.
A.
much of tomorrow food
B.
many of tomorrow's food
C.
much of the food of tomorrow
D.
much of tomorrow's food
【单选题】One of the few things you ____ say about English people with certainty isthat they talk a lot about the weather. 21
A.
need
B.
must
C.
should
D.
can 21
【单选题】An ecosystem consists of the living and nonliving things in an area ________ interact with one another.
A.
that
B.
where
C.
who
D.
what
【判断题】one of the things that decides whether an applicant can be accepted by a college is his / her scores on the scholastic aptitude tests. ()
A.
正确
B.
错误
【单选题】Which one is more important, doing right things, or doing things rightly?
A.
doing right things
B.
doing things rightly
【简答题】All living things on the earth need other living things to live with. Nothing lives 1 . Sometimes one living thing kills 2 . Each kind of life eats another kind of life 3 live, and together they form ...
【简答题】There are generally two things that decide the disability caused by deafness: one is the age at which hearing is lost, and the other is ______.
【单选题】听力原文： Listening is one of the first things we learn to do, and one of the things we do most. The average person spends 9% of his daily communication time writing, 16% reading, 30% speaking and 45% lis...
A.
Writing.
B.
Reading.
C.
Speaking.
D.
Listening.
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