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【单选题】
哈勃恒星光谱型分类有:A.
O、B、A、R、G、K、Q七个光谱型
B.
O、E、A、F、G、K、M七个光谱型
C.
O、B、K、D、M、S、E七个光谱型
D.
O、B、A、F、G、K、M七个光谱型
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反馈参考答案：
举一反三
【简答题】幸福;快乐,愉快
【单选题】China the WTO and became a new member of it last year .
A.
joined
B.
join h
C.
will join
D.
as joined
【单选题】China _____ the WTO and became new member of it last year. [ ]
A.
joins
B.
joined
C.
will join
D.
has joined
【单选题】乡村医生从业管理条例的适用对象为( )
A.
执业医师
B.
执业助理医师
C.
执业药师
D.
未取得执业医师资格或执业助理医师资格，经注册在村医疗卫生机构从事预防、保健和一般医疗服务的乡村医生
【单选题】China the WTO and became a new member of it last year .
A.
joined
B.
join
C.
will join
D.
has joined
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