答案　B

　　2．Which of the following statements on the methods of drawing the conclusion is TRUE?

　　A．by analyzing the records of 1,800 women and their babies in three polluted areas

　　B．by weighing the newly­born baby and comparing the average in ideal conditions

　　C．by using a computer to calculate the density of traffic gases where the babies are born

　　D．by calculating the density of traffic gases during the whole period of pregnancy

　　解析　该题考查学生的细节推断能力。关键信息在第二段：①took the baby's weight at birth　②worked out their expected size　③a computer model was calculating。

　　答案　B

　　3．The underlined word “associations” in Paragraph 3 probably refers to________.

　　A．efficient corporations

　　B．helpful organizations

　　C．serious influences

　　D．causal relationships

　　解析　该题考查学生对生词词义或多义词词义的理解与推断能力。associations：有联系；结合；关联；友谊；协会。在该篇文中所表达的词义是：怀孕妇女在空气污染区生活与新生婴儿体重之间存在直接的因果关系。

　　答案　D

　　4．Why did Dr.Gavin Pereira feel UNEXPECTED at his current research results?

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