【正文】
通讀全文可知 , 本文主要介紹了研究人員的一項(xiàng)新發(fā)現(xiàn) , 即蜂群中也有 “ 兵蜂 ” , 故選 B項(xiàng) 。 guard lacks a sting and is eventually killed, it can knock its head onto the wing of a robber bee, preventing it from flying. 可知 A項(xiàng)正確 。39。 guards________. A. are very selfless and brave B. can easily defeat their enemies C. are the only guards in their colony D. will take on other tasks when getting old 答案: A 推理判斷題 。 因此 , 此處的 counterparts是指 guards。 結(jié)合上文內(nèi)容可知 , 此處是把Jata237。 guard lacks a sting可知 A項(xiàng)正確 。 1. What do we know about Tetragonisca angustula? A. It has no sting. B. It lives in forests. C. It is a rare insect. D. It has a small family. 答案: A 細(xì)節(jié)理解題 。s main enemies—t