单项选择题

A．As a result
B．Moreover
C．However
D．In addition
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单项选择题
A．in mmB．at allC．by chanceD．on average
A．in mm
B．at all
C．by chance
D．on average
单项选择题
A．researchB．specialistC．treatmentD．operation
A．research
B．specialist
C．treatment
D．operation
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