托福考试

【单选题】
{$mediaurl}
Based on this lecture, what can we infer about the future of marine mammalsA．Dolphins and whales will adapt to environmental changes.
B．Marine traffic and underwater testing may cause their extinction.
C．People will be able to communicate directly with this species.
D．Marine animals will be used for military and commercial purposes.

网考网参考答案：B
网考网解析：
[解析] 推理题 如果记得讲座的最后一部分就可以很轻松地找到答案。利用水中声波探测器的商业或军事活动威胁了海洋哺乳动物的生存，因此可以推断B项是正确答案(So there is increasing evidence that commercial and military activities using sonar are negatively affecting the lives of marine mammals.)。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>