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问题
单项选择题
施工总承包企业资质共分为()个等级
A.2
B.3
C.4
D.5
答案
参考答案:
C
选择题
— Will there be ______water on the earth in the future?
— Yes, people will not have enough water to drink by then.
[ ]
A.much
B.little
C.less
D.more
v
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填空题
运行中上部输送带()和(),下部输送带不磨机架。
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