【正确答案】 A

【答案解析】[听力原文]
Scientists understand how twins were born, now though, they are trying to explain how being half of the biological pair influences a twin"s identity. They want to know why many identical twins make similar choices even when they don"t live near each other.
For example, Jim Springer and Jim Louis are identical twins. They were separated when they were only 4 months old. The two Jims grew up in different families and did not meet for 39 years. When they finally met, they discovered some surprising similarities between them. Both men were married twice, their first wives were named Linda, and their second wives were both named Betty. Both twins named their first sons James Alien. Scientists want to know what influences are personality. They study pairs of identicaltwins who grew up in different surroundings, like Jim Springer and Jim Louis. These twins help between environment and biology. Researchers at the University of Minnesota, studies 350 sets of identical twins who did not grow up together. They discovered many similarities in their personalities. Scientists believed that personality characteristics such as friendliness, shyness and fears are not result of environment. These characteristics are probably inherited. Scientists continue to study identical twins because they are uncertain about them and have many questions. For example, they want to know "Can twins really communicate without speaking?" "Can one twin really feel another twin"s pain?" Perhaps with more research, scientists will find the answers.

What are scientists trying to explain according to the passage?

[解析] 细节题。题目问的是根据对话，科学家试图解释什么。文章开头就说道“Scientists... they are trying to explain how being half of the biological pair influences a twin"s identity.”即“科学家正试图解释双胞胎的个性是如何受到影响的”。故A项为正确答案。短语“trying to explain”在题目和原文中均出现，是本题的解题关键。

【正确答案】 B

【答案解析】[听力原文]
What do we learn about the twin Jims?

[解析] 细节题。文章中介绍了两个“Jim”的情况：他们只有四个月大的时候就分开了，他们在不同的家庭中长大，直到39年后才见面；他们都结过两次婚；他们的第一个妻子叫Linda，第二个妻子都叫Betty；他们的第一个儿子都叫James Allen。根据第一条信息可知，他们是在不同的环境中长大的，B项中的“different，surroundings”是原文中“different families”的同义表达，故选B。

【正确答案】 A

【答案解析】[听力原文]
Why are scientists interested in studying identical twins raised in different families?

[解析] 细节题。文中提到“These twins help scientists understand the connection between environment and biology.”意思是说，这些双胞胎帮助科学家理解环境和生物之间的关系，而“these twins”即指前一句话中的“identical twins who grew up in different surroundings”。根据这两句表述可知，科学家研究生活在不同家庭中的同卵双胞胎是为了找到环境和生物之间的关系。故选项A正确。原文中的“grew up in different surroundings”在题目中表达为“raised in different families”，原文中的“connection”在选项A中表达为“relationship”。