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【多选题】
（）是球墨铸铁的焊接特点。A.
产生白口铸铁组织的倾向比灰铸铁小
B.
产生白口铸铁组织的倾向比灰铸铁大
C.
对焊接接头的力学性能要求高
D.
淬硬倾向倾向比灰铸铁大
E.
淬硬倾向倾向比灰铸铁小
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反馈参考答案：
举一反三
【单选题】3 support / lay B A substructure is required to _______________the weight of a train.
A.
support
B.
lay
【单选题】3 support / lay A Rail companies________________ new track to create new routes.
A.
support /
B.
lay
【单选题】When finding his way Dad tends to rely on
A.
his intuitive knowledge
B.
his book knowledge．
C.
Mum’s assistance．
D.
the police’s assistance．
【多选题】旅游产业的政策扶持的内容有 ( ) 。
A.
推进旅游休闲体系建设
B.
推动区域旅游合作
C.
促进与其他产业融合发展
D.
扶持老少边穷地区旅游发展
E.
促进各地特产销售
【单选题】According to the passage, a child may inherit______.
A.
everything from his mother
B.
a knowledge of mathematics
C.
a rather general ability that we call intelce
D.
her mother's musical ability
【单选题】已知书目信息：Tallis Marcelo，Waltzman Rand Robert．Adding deductive logic to a COTS spreadsheet．Knowledge Engineering Review，v 22，n 3，September，2007，p255—268，其中( )可作为检索iPAC的题名关键字。
A.
Tallis Marcelo
B.
Waltzman Rand Robert
C.
Adding deductive logic to a COTS spreadsheet
D.
Knowledge Engineering Review
【判断题】Please mark “yes” or “no” in the brankets according to your knowle age or comprehension Materials science investigate the relationships between the structures and properties of materials. ( )
A.
正确
B.
错误
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