在建立唯一索引，出现重复字段时，只存储重复出现的记录的( )。
A．第一个
B．最后一个
C．全部
D．几个
参考答案：A
He put forward a theory,（）of great importance to the progress of science of technology
A.I think which is
B.which I think is
C.which is I think
D.I think it is
国务院反垄断执法机构作出不实施进一步审查的决定或者逾期未作出决定的，经营者可以实施集中。
