问答题

有人喜欢用电话交流，因为…… 2. 有人则喜欢用书信交流，因为…… 3. 我的看法。 Telephone or Letter

【参考答案】

Telephone or Letter Communication is very important ......

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单项选择题

To geneticists like Lewontin and Hartl, the current method ______.

A．is not so convincing as to exclude the likelihood that two DNA samples can never come from two individuals
B．is arguable because two individuals of the same ethnic group are likely to have the same DNA pattern
C．is not based on adequate scientific theory of genetics
D．is theoretically contradictory to what they have been studying

单项选择题

National Academy of Sciences has the opinion that ______.

A．DNA testing should be systematized
B．only authorized laboratories can conduct DNA testing
C．the academy only is authorized to work out standards for testing
D．the academy has the right to accredit laboratories for DNA testing

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