Question

    Dolphin or not a dolphin?That is the question!You see,there are several types of dolphins.Some are saltwater dolphins while others are river dolphins.

＂What are the 32 types of dolphins?"When people are asking the question,they are actually referring to the saltwater dolphins in oceans and seas.The river dolphins living in fresh water,are not included in these species.But what would be the answer in this case if we ask,"Dolphin or not a dolphin?"The answer would obviously be yes.River dolphins still belong to the dolphin family.

Among the 32 types of dolphins,some do not actually wear the word"dolphin”in their names,such as the tucuxi,while others actually have the word"whale"as part of their names even if they are not whales but in fact,belong to the dolphin family,for example, the melon-headed whale and the killer whale.So what would be the answer to the question＂dolphin or not a dolphin?"in these cases?It would be yes.All these species do belong to the dolphin family.

Another question that people ask is,"Are the sea animals that perform at aquariums all dolphins?"So,it always seems to come back to the question,"Dolphin or not a dolphin?"

Well the answer is no in this case.The sea animals that perform there are not all dolphins. The beluga which people tend to think belong to the dolphin family because they show what seems like a smile,like most dolphins,are in fact a species of the whale family.

Now that you read these facts about dolphins,you probably realize that certain sea animals may appear to be part of the dolphin species and that others seem to be part of the whale family,but in either case,it is not obvious and can be surprising when you identify a sea animal as being a dolphin or not a dolphin.That is the question!

1.What do we know about the majority of the dolphins?

A.They look like whales. B.They appear friendly.

C.They perform for audience. D.They live in fresh water.

2.What could be added about dolphins before the last paragraph if you were the author?

A.The living area. B.Dolphin training.

C.The eating habits. D.Further identification.

3.This article can be classified as_____.

A.popular science B.literary fiction

C.a travel diary D.a news report

Answer

1.B

2.D

3.A

【解析】

本文是说明文，文章介绍了有关如何区别海豚种类的相关知识。

1.

推理判断题。根据第五段中“The beluga which people tend to think belong to the dolphin family because they show what seems like a smile, like most dolphins（人们往往认为白鲸属于海豚家族，因为它们表现出的微笑，就像大多数海豚一样）”，可以推断，大部分海豚看起来向在对人微笑，看起来很友好。故选B项。

2.

推理判断题。根据最后一段中“but in either case, it is not obvious and can be surprising when you identify a sea animal as being a dolphin or not a dolphin. That is the question! （但在这两种情况下，当你将海洋动物识别为是海豚或不是海豚时，这并不明显，也可能令人惊讶。 这就是问题所在！）”可以推断，如果在最后一段前补充关于海豚的内容，应该补充说明如何进一步识别海洋动物是否属于海豚家族。故选D项。

3.

推理判断题。文章是关于海豚的种类，介绍了如何识别海洋动物是否属于海豚物种的有关知识，因此是属于科普类的文章。故选A项。