問題詳情
【題組】70. How does tobacco protect itself against an attack from a caterpillar?
(A) Its leaves fight against the attack by physical means.
(B) Its roots send a messenger to discourage the caterpillar.
(C) Its roots increase the production of nicotine when it is attacked.
(D) Its leaves produce poisonous sand to drive the caterpillar away.
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)