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【单选题】
溶原性转换是指
A.
前噬菌体直接与宿主基因组发生重组
B.
细菌基因的突变
C.
以噬菌体为媒介进行的DNA的转移重组
D.
受菌直接摄取供菌的DNA片段
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参考答案:
举一反三
【单选题】The sweater is made of ________.
A.
plastic
B.
steel
C.
leather
D.
wool
【单选题】The sweater is _______ of wool. [     ]
A.
make
B.
makes
C.
made
D.
making
【简答题】选择方框中的单词填空。 The sweater is made of ________. The table is made of ___________. The cup is made of ___________. The raincoat is made of ___________.
【判断题】六七岁时儿童的脑重已基本接近成人的脑重。()
A.
正确
B.
错误
【单选题】—Tom, look at he label of you new sweater. What does it say? —It says ______. [     ]
A.
the sweater is made of silk
B.
the sweater can be dry-cleaned
C.
the sweater is made in the USA
D.
the sweater can be washed in a washing machine
【判断题】社会认可的幸福会随着时代的发展而发生变化。()
A.
正确
B.
错误
【简答题】The sweater is made of_
【单选题】This is the sweater ______ my mother made for me.
A.
who
B.
that
C.
where
【判断题】六七岁的儿童的脑重已基本接近成人的脑重。( )
A.
正确
B.
错误
【判断题】while( 'a' ) ;是一个死循环。
A.
正确
B.
错误
参考解析:
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