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【判断题】
N型半导体的多数载流子是自由电子，因此N型半导体带负电。()A.
正确
B.
错误
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【简答题】以噬菌体为媒介的DNA转移是( )。A.转化 B.转导 C.接合 D.原生质体融合 E.转染 涉及形成短暂的二倍体菌细胞进行基因交换的是( )。A.转化 B.转导 C.接合 D.原生质体融合 E.转染 细菌直接摄取外源DNA的是( )。A.转化 B.转导 C.接合 D.原生质体融合 E.转染 通过性菌互连接沟通进行DNA转移的是( )。A.转化 B.转导 C.接合 D.原生质体融合 E.转染
【单选题】Would you mind my little sister while I am away? —Of course not.
A.
looking for
B.
looking at
C.
looking after
D.
looking forward to
【简答题】完形填空。 Gold Mine in Scotland If you were interested 1 a gold miner, you would probably not think 2 to Scotland to begin your career. But 3 a gold rush in Scotland a hundred years ago, even though it on...
【单选题】You are delivering training to a group of Japanese expatriates at your offices and you notice that most of the group do not have any eye contact with you while you are explaining a technical process. ...
A.
They are concentrating and listening hard.
B.
They are suffering from jet lag and struggling to stay awake.
C.
They are distracted from your session.
【单选题】—Would you mind ________ my pet dog while I'm not at home? —Of course not. [ ]
A.
looking at
B.
looking up
C.
looking for
D.
looking after
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