2. 外语
  3. The second line of defense in keeping plant diversity seems to be______ The main point of the passage is______

The second line of defense in keeping plant diversity seems to be______ The main point of the passage is______

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问题 The second line of defense in keeping plant diversity seems to be______
The main point of the passage is______
选项 A、to try to find out ways to protect plant diversity.
B、to call on people to help the developing countries to protect plant diversity.
C、to tell us how important plant diversity is to our life.
D、to stress the importance of setting up gene banks and conservations to protect plant diversity.
答案A
解析
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