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【单选题】
有关“接合”的叙述,哪一项是错误的:A.
F＋菌与F－菌进行接合时，转移的是F
B.
Hfr菌与F－菌进行接合时，转移的主要是染色体DNA
C.
F＇菌与F－菌进行接合时，转移的是染色体DNA和F
D.
F＇菌与F－菌进行接合后，'F＇菌失去F
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【简答题】与同容量的变压器相比较，感应电动机的空载电流大还是变压器的空载电流大，为什么?
【单选题】---This is the first time I _____ my first picture with my own hands. --- It’s time that you ____ a photo of me.
A.
took; took
B.
have taken; took
C.
took; will take
D.
will take; have taken
【单选题】If I were in movie, then it would be about time that I ______ my bead in my hands for a cry.
A.
bury
B.
am burying
C.
buried
D.
would bury
【单选题】－What did you think of the place? --I didn’t care for it at first, but after _____ time I got to like it．
A.
the；a
B.
/；a
C.
a；the
D.
/；the
【单选题】—This is the first time I __________ my first picture with my own hands. —It's time that you __________ a picture for me.
A.
took; will take
B.
have taken; took
C.
took; took
D.
will take; have taken
【简答题】阅读理解。 Hello! My name is Mike. I am from (来自) the USA. Now I am in China with my parents. I like China. I like Chinese food, too. I have breakfast at home. I eat an egg, bread and porridge (粥) for brea...
【单选题】If I were in a movie, then it would be about time that I ______ my head in my hands for a cry.
A.
bury
B.
am burying
C.
buried
D.
would bury
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