单项选择题

A．in which
B．from which
C．of which
D．by which
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单项选择题
A．To learn how to prevent a bone disease.B．To understand differences between bone tissue and other tissue.C．To find out how specialized bone cells have evolved.D．To create artificial bone tissue.
A．To learn how to prevent a bone disease.
B．To understand differences between bone tissue and other tissue.
C．To find out how specialized bone cells have evolved.
D．To create artificial bone tissue.
单项选择题
A．He was very slow in doing things.B．He is expected to do such a thing.C．He was the right person to do such a thing.D．He would never do such a thing.
A．He was very slow in doing things.
B．He is expected to do such a thing.
C．He was the right person to do such a thing.
D．He would never do such a thing.
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