单项选择题


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

A．Find a hotel nearby again in a few days.
B．Accommodate his parents in his dormitory.
C．Ask his parents not come until he finds a proper hotel.
D．Phone a hotel farther from the campus for a reservation.
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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 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
单项选择题
What underwater action can lead to the production of pollution similar to that produced by fossil fuel power stations
A．Mass dying of underwater creature.
B．Recycling of underwater waste products.
C．Decomposing flooded vegetation.
D．Abstracting underwater oil.
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