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搜题
【多选题】
在国际贸易中,按样品提供者的不同可分为( )
A.
凭卖方样品买卖
B.
凭买方样品买卖
C.
凭对等样品买卖
D.
凭图样买卖
E.
凭参考样品买卖
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皮皮学刷刷变学霸
举一反三
【单选题】已知全集U={1,2,3,4,5},集合A={3,4},B={2,3,5},那么集合A∪(C ∪ B)等于(  )
A.
{1,2,3,4,5}
B.
{3,4}
C.
{1,3,4}
D.
{2,3,4,5}
【判断题】Collins 试剂是指 铬酸吡啶盐 ( )。
A.
正确
B.
错误
【判断题】Collins 试剂是指 氯铬酸吡啶鎓盐 ( )。
A.
正确
B.
错误
【单选题】已知全集U={1,2,3,4,5},A={1,3},B={3,5},则
A.
{1,2,4,5}
B.
{1,5}
C.
{2,4}
D.
{2,5}
【单选题】现实主义和自由主义都认为国家是理性的,两者
A.
没有区别
B.
有很小的不同
C.
一个指强制理性,一个指合作理性
D.
没有任何共同点
【单选题】已知全集U={1,2,3,4,5},集合A={1,3},B={3,4,5},则集合C U (A∩B)=(  )
A.
{3}
B.
{4,5}
C.
{3,4,5}
D.
{1,2,4,5}
【判断题】Collins 试剂是指 铬酐吡啶配合物 ( )。
A.
正确
B.
错误
【单选题】He told us ________ sad and that it would be better for everyone.
A.
don't be
B.
doesn't be
C.
not be
D.
not to be
【简答题】Once my father and I went to see a circus(马戏 ). A family was standing in front of us for tickets. The family had eight children. Their clothes were not but they were clean. They were talking about the...
【单选题】He told us not ________ sad, and that it would be better for everyone to keep calm.
A.
be
B.
being
C.
to be
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