单项选择题

A．Make sure there is no misunderstanding.
B．Try to persuade by giving various reasons.
C．Repeat the same reasons.
D．Listen carefully and patiently to the other party.
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问答题
For Christians, Easter eggs symbolize________.
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 beyond dispute 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
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