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【单选题】
1928年，格里菲思的小鼠活体内肺炎双球菌转化实验，成功的表明了 [ ]A.
加热杀死的S型细菌中，DNA已经失去活性而蛋白质仍具有活性
B.
加热杀死的S型细菌中，含有促使R型细菌发生转化的活性转化因子
C.
蛋白质是遗传物质
D.
DNA是遗传物质
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【简答题】试简述补料分批培养的优点
【单选题】Before his death last year, Professor Talline decided that he _________ leave $100,000 to iris university.
A.
can
B.
would
C.
may
D.
shall
【简答题】Before his death, ______had gained a position as America s first systematic philosopher.
【单选题】How does the ending of the story indicate the elevation of Harry?
A.
Before his death, he dreams of climbing the summit of Kilimanjaro in a helicopter
B.
Before his death, he is able to fight death many times over
C.
Before his death, he is reunited with the woman he loves
D.
Before his death, he is able to see his fellow man
【单选题】Attached to his ________ was a letter he had written to his wife just days before his death. [ ]
A.
will
B.
way
C.
hope
D.
idea
【简答题】Before his death last year, Professor Johnson decided that he ________ leave $ 2,000,000 to his university. A) can B) would C) may D) shall
【单选题】The case of his death is being ________ and will be found out before long. [ ]
A.
looked up
B.
looked for
C.
looked into
D.
looked on
【简答题】如何利用和发挥相关群体的作用
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