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【单选题】
()对完成的DNA片段去除5'端的RNA引物是必需的。A.
DNA聚合酶 I
B.
DNA聚合酶 II
C.
DNA聚合酶 III
D.
DNA旋转酶
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皮皮学刷刷变学霸
举一反三
【简答题】In recent years his health has ____________.
【单选题】In recent years his health has ___________.
A.
goes downhill
B.
went downhill
C.
gone downhill
D.
go downhill
【单选题】成人脊椎结核和椎体肿瘤在X线上的主要鉴别点是观察
A.
椎体破坏的程度
B.
椎体破坏的数目
C.
椎旁软组织阴影的形态
D.
椎间隙是否变狭窄或消失
E.
椎体骨质疏松的程度
【简答题】e____e______t______ally
【单选题】IQ test is origin ally used to______.
A.
find out the students who need extra help in learning
B.
assign young people to different majors
C.
select the acceptable recruits for army
D.
select the leaders for society
【单选题】In the second stage of the evolution of mind,______.
A.
the response of the organism is determined by the intrinsic properties of the things in question
B.
the reactions of the organism are free from the intrinsic properties of things
C.
the organism distinguishes between things involved at a distance
D.
the organism can merely react to an intermediate stimulus
【单选题】His books_popularity in recent years.
A.
has gained in
B.
have gained in
C.
has gained on
D.
have gained on
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