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Research discovered that plants infected with a virus give off a gas that______ disease resistance in neighboring plants.
Research discovered that plants infected with a virus give off a gas that______ disease resistance in neighboring plants.
admin
2013-01-20
21
问题
Research discovered that plants infected with a virus give off a gas that______ disease resistance in neighboring plants.
选项
A、contracts
B、activates
C、maintains
D、prescribes
答案
C
解析
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0
考博英语
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