单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．The present house is too old.
B．The new house is more comfortable.
C．The old house is far from her work.
D．She needs a quiet place.
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单项选择题
A．Customs officer and traveler.B．Shop assistant and customer.C．Repairman and customer.D．Postman and customer.
A．Customs officer and traveler.
B．Shop assistant and customer.
C．Repairman and customer.
D．Postman and customer.
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
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