单选题 A scientific law is liable at any time to need modifying. This happens when fact is discovered which seems to ______ what the law would lead one to expect.

A.prove
B.support
C.contradict
D.discourage

【正确答案】 C

【答案解析】[解析] C选项contradict(与……相矛盾)符合题意，如：Your actions contradict your principles．(你的行为与你的道义相矛盾。)A选项prove(证实)、B选项support(支持)、D选项discourage[使(某事)难以发生]都不正确。本题是说一项科学定律随时都可能需要改进，这发生在新的事实违背该定律时。因此C选项为正确答案。