What topic are the man and woman discussing? [originaltext]M:I really appreciate

游客2024-09-26  9

问题 What topic are the man and woman discussing?
M:I really appreciate your filling me in on yesterday’s lecture.
W:No problem. I thought you might want to go over it together. And, anyway, it helps me review. Hope you’re feeling better now.
M:I am. Thanks. So, you said she talked about squid? Sounds a little strange.
W:Well,actually, it was about the evolution of sea life—a continuation from last week. The octopus and the squid descended from earlier creatures with shells.They survived by shedding their shells—some where between 200 and 500 million years ago.
M:That’s a pretty long span of time. Some squid are really huge. Can you imagine something that big if it still had a shell?
W:Actually, it’s because they lost their shells that they could evolve to a bigger size.
M:Make sense. I’ve read about fishermen who caught squid that weighed over a ton. Did she talk abouthow that happened?
W:Not really. But she did mention some unusual cases. In 1933 they caught a squid in New Zealand...let’s see here... it was twenty-two yards long.
M:Remind me of all those stories of sea monsters.
W:Dr.Simpson thinks there are probably even larger ones that haven’t been found because squid areintelligent and fast—so they can easily get away from humans. Maybe some of those monster stories are true.

选项 A、Mating habits of squid and octopus.
B、The evolution of certain forms of sea life.
C、The study of marine shells.
D、Survival skills of sea creatures.

答案 B

解析 主旨大意题。对话开始是相互的客套,并不是对话的焦点。下面谈话的焦点是从男士的一个问题开始,即“你说她谈到了乌贼是吗?”而女士的回答很好地概括了这一问题.她说:“实际上是关于海洋生物进化的,是上堂课的延续。”从这句话开始,他们的谈论便集中在某些海洋生物的进化上。选项B概括准确。
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