Researchers discovered that plants infected with a virus give off a gas that ___

游客2024-10-11 17

问题 Researchers 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 B

解析动词辨析。contract意为“感染”；activate意为“刺激、使活动”；maintain意为“维持”； prescribe意为“规定、开处方”。根据句意应选activates。

转载请注明原文地址:https://tihaiku.com/zcyy/3797272.html

相关试题推荐

随机试题

最新回复(0)

Gunpowderwasdiscoveredinthetwelfthcentury,but______.A、mandidn’tputitt