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【单选题】
一健康儿童其身长 95cm ,乳牙 20 个,腕部骨化中心 4 个,该儿童的年龄大约是A.
1岁
B.
2岁
C.
3岁
D.
4岁
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举一反三
【单选题】A lysogenic bacterium ( ).
A.
Carries a prophage
B.
Causes lysis of other bacteria on contact.
C.
Cannot support the replication of a virulent phage
D.
Is often a human pathogen
E.
Is usually not capable of conjugal genetic transfer
【单选题】We will be shown around the city: schools,museums,and some other places,______ other visitors seldom go. [ ]
A.
what
B.
which
C.
where
D.
when
【单选题】Schools should be lively places where individuals are encouraged to _____ to their greatest potential.
A.
accelerate
B.
improve
C.
perform
D.
develop
【多选题】What are wrong statements with respect to lysogen and prophage.
A.
If there is only growth of few lysogens, the E. coli lawn would be turbid
B.
The integrated phage is called as lysogen
C.
The infected bacterial cell is called a prophage
D.
If lysogens won’t be formed, the plaques won’t be clear
【单选题】We will be shown around the ciry: schools, museums, and some other places, _____ other visitors seldom go. [ ]
A.
what
B.
which
C.
where
D.
when
【简答题】A．offices B．schools C．cities D．places
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