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【简答题】
瓜果蔬菜被细菌污染后,用约( )%浓度的高锰酸钾溶液浸泡5分钟左右,再用流水冲洗干净,即可杀菌,而不改变果蔬的色泽和味道。(数字)
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举一反三
【单选题】—Where shall we go to spend the weekend? —Nowhere ________. Anywhere you like. [ ]
A.
in all
B.
in general
C.
in case
D.
in particular
【简答题】Rewrite each sentence with the word or phrase in brackets, keeping the same meaning. The first part has been written for you. As a result of the rapid advance in the gene therapy, cures for cancers ma...
【单选题】If you warn me _____ , I’ll have your order ready for you.
A.
in brief
B.
in return
C.
in advance
D.
In general
【单选题】If you put a gene in a virus, the next step in genetic modification would be
A.
insertion of a plasmid.
B.
transformation.
C.
transduction.
D.
PCR.
E.
Southern blotting.
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