二级笔译题库/词汇与语法

Aphids, which are particularly vulnerable to predators because of their gregarious habits and sedentary nature, secrete an alarm pheromone when attacked that causes nearby aphids to respond by moving away.

  • A inactive
  • B inefficient
  • C unchangeable
  • D unbalanced
参考答案: A
解题思路: >>>立即刷题