托福真题阅读alaska and bark beetles答案及解析. 1.答题解析：答案:C；Subtle：微妙的。所以选C。 2.答题解析：答案:A； 此段讲气候的影响讲了两点：（1）As the length of the warm season increased over the 1980s and 1990s,however,bark beetles had more time to ...