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【单选题】
一化合物出现下面的红外吸收谱图,可能具有结构 I、II、III或IV,哪一结构与光谱最近于一致?A.
I
B.
II
C.
III
D.
IV
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反馈参考答案：
举一反三
【判断题】本市规定，建筑施工特种作业人员包括：建筑起重信号司索工;建筑起重机械司机;建筑起重机械安装拆卸工;吊篮安装拆卸操作工;桩工机械安装拆卸工;建筑焊割操作工;建筑电工;普通脚手架架子工;附着升降脚手架架子工。( )
A.
正确
B.
错误
【单选题】The trees arrived by post, a half-open parcel. They were thin and straight, rather like arrows but with shiny leaves at one end and muddy roots at the other. Terry and his father took them down the ga...
A.
protection of environment
B.
relationship between neighbors
C.
generation gap
D.
cause of jealousy
【单选题】为防止吊杆后翻(翻关)而失去控制,布置轻型单千斤索双杆时,应确保千斤索所受的张力( )
A.
出现极大值
B.
出现极小值
C.
不至降为零甚至出现负值
D.
出现负极大值
【单选题】如果通过从“数据库”窗口拖曳( )的方式来向宏中添加操作,Access将自动为 这个操作设置适当的参数。
A.
、宏对象
B.
、窗体对象
C.
、报表对象
D.
、数据库对象
【单选题】They about eight hundred English words by the end of last term. [ ]
A.
will learn
B.
had learned
C.
are going to learn
D.
have learned
【简答题】完形填空 What do you do at the weekend?Some people like to 1 at home,but others like to go 2 a walk or play football.My friend Jack works hard in a factory during the 3 .At the weekend,he always 4 the sam...
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