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A．The bacteria would be killed by the human immune system.
B．The bacteria would die if brought to the surface.
C．Many antidotes and remedies are available.
D．Drilling operations are always closely monitored.
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单项选择题
A．He is one of the Procrastination Research Group.B．He is a psychologist.C．He is a teacher in Carleton University in Ottawa.D．He is the co-author of the study.
A．He is one of the Procrastination Research Group.
B．He is a psychologist.
C．He is a teacher in Carleton University in Ottawa.
D．He is the co-author of the study.
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