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【单选题】
细菌染色体外的遗传物质包括下列哪项A.
质粒、噬菌体、拟核
B.
质粒、噬菌体、转位因子
C.
质粒、核糖体、转位因子
D.
质粒、中介体、拟核
E.
体核糖体、噬菌体、噬菌体
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反馈参考答案：
举一反三
【单选题】Based on the passage, it seems that the purpose of the cafe is to______.
A.
learn a skill
B.
help a youth project
C.
do business
D.
earn school credit
【多选题】如果( )成立,则事件A与B独立.
A.
P(AB)=P(A)P(B)
B.
P(A+B)=P(A)+P(B)
C.
P(A|B)=P(A)(P(B) 0)
D.
P(B)=1- P(A)
【单选题】The main purpose of this passage is ______.
A.
to prove that man is a descendent from some higher animal
B.
to satirize human greediness
C.
to prove that man is superior to other animals
D.
to criticize man as a maniac
【单选题】What is the purpose of the National Institute of Child Health and Human Development?
A.
To help all the weak children and women.
B.
To study the genes of babies and mothers.
C.
To find out what affects healthy development in people.
D.
To study why babies are influenced by their environment.
【单选题】The author's purpose in writing this passage is to______.
A.
show that taste preference is highly subjective
B.
argue that taste testing is an important marketing strategy
C.
emphasize that taste and price are closely related to each other
D.
recommend that blind tasting be introduced in the quality control of colas
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