单项选择题

A．They break down bone tissue.
B．They defend the bone against viruses.
C．They connect the bone to muscle tissue.
D．They prevent oxygen from entering the bone.
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单项选择题
A．All dictionaries before 1750 were not valuable.B．In the Oxford Dictionary, its word histories is the most important part.C．Every author after Robert Cadre benefited by the previous authors’ experience.D．The value of a dictionary lies in the number of words collected in it.
A．All dictionaries before 1750 were not valuable.
B．In the Oxford Dictionary, its word histories is the most important part.
C．Every author after Robert Cadre benefited by the previous authors’ experience.
D．The value of a dictionary lies in the number of words collected in it.
单项选择题
A．By writing a personal check.B．By changing them to their personal account.C．By paying in cash.D．By using a store credit card.
A．By writing a personal check.
B．By changing them to their personal account.
C．By paying in cash.
D．By using a store credit card.
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