单选题______AbutBnot CorDnor

单选题
______
A

but

B

not  

C

or

D

nor


参考解析

解析:
根据上句“...can be as minor as. . .,”“可能微小到…”,又根据后面的“...as major as...”,“能大到…”,由此可知应是一种选择关系,or表示一种选择关系,故用or。

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