The author of the passage is primarily concerned with _______.
A.comparing several current interpretations of early American history
B.suggesting that new social research on migration should lead to revisions in current interpretations of early American history
C.refuting an argument about early American history that has been proposed by social historians
D.discussing a reinterpretation of early American history that is based on new social research on migration
第9题
下列哪种药物与速尿合用可增强毒性()。
A.先锋霉素
B.氨基糖苷类
C.四环素
D.氯霉素
E.红霉素
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