2. 考研
  3. Researchers discovered that plants infected with a virus give off a gas that ______ disease resistance in neighboring plants.

Researchers discovered that plants infected with a virus give off a gas that ______ disease resistance in neighboring plants.

admin2008-12-26  57
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、prescribe
答案B
解析 本题为动词词义辨析题。contract意为"收缩"；maintains意为"维持；维修；供养；主张"；prescribe意为"开(药方)；规定"；activate意为"使开始起作用"，与其后的disease resistance形成动宾搭配，意为"激活抗体"。故选项activates为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/cri4777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)