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【单选题】
工件幅面较大、跨度较大的大型精加工平面，常被用作第一定位基准面，为使工件安装稳固可靠，大多选用（）来体现夹具上定位原件的定位表面。A.
支撑板
B.
支撑钉
C.
可调支撑
D.
辅助支撑
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反馈参考答案：
举一反三
【单选题】In a cumulative frequency polygon:
A.
the class frequencies are converted to percents.
B.
the cumulative frequency for the first class limit is zero.
C.
we add the class frequencies starting with the first class.
D.
all of the above.
【单选题】Every host and router on the Internet has an IP address, which encodes its(12).
A.
host number
B.
network number
C.
host number and socket
D.
host number and network number
【单选题】Every device on the Internet has an assigned ( ) such as 128.110.192.40.
A.
MAC address
B.
Protocol
C.
IP address
D.
domain name
【单选题】In a cumulative frequency polygon:
A.
the class frequencies are converted to percents.
B.
all of the above.
C.
we add the class frequencies starting with the first class.
D.
the cumulative frequency for the first class limit is zero.
【单选题】Nowadays the Internet has an enormous advantage _____ the press.
A.
about
B.
around
C.
over
D.
beyond
【单选题】Every host and muter on the Internet has an IP address,which encodes its(69).
A.
host number
B.
host number and socket
C.
network number
D.
host number and network number
【单选题】There is ______ interesting book on the shelf, ______ book is Jim's. [ ]
A.
a, the
B.
an, a
C.
an, the
D.
a, a
【单选题】It's on the top of the shelf, out of ______.
A.
distance
B.
reach
C.
touch
D.
attempt
【单选题】● Every host and router on the Internet has an IP address，which encodes its (69) ． (69)
A.
host number
B.
host number and socket
C.
network number
D.
host number and network number
【单选题】Every host and router on the Internet has an IP address, which encodes its(72).
A.
host number
B.
network number
C.
host number and socket
D.
host number and network number
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