2. 外语
  3. The purpose of this text is______。 Which of the following is a plant bacterium used to grow vaccines?

The purpose of this text is______。 Which of the following is a plant bacterium used to grow vaccines?

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问题 The purpose of this text is______。
Which of the following is a plant bacterium used to grow vaccines?
选项 A、agrobacterium tumefasciens
B、coli
C、Norwalk
D、one that causes diarrhea
答案A
解析 见第三段“Then they used a modified plant bacterium called Agrobacterium umefasciens to transfer the segment of DNA which manufactures the binding protein into the tobacco plant．”他们然后用一种叫做根瘤土壤杆菌的改变过的植物细菌将能产生结合蛋白的DNA片段移植进烟草。
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