多选题 For Albert Einstein, the unvarying speed of light was a ______, an essential presupposition on which his reasoning was based.

A、 prerequisite
B、 contingency
C、 postulate
D、 confirmation
E、 discrepancy
F、 corroboration

【正确答案】 A、C

【答案解析】[解析] ● 逗号说明前后同义重复。
● 空格与essential presupposition(必要的前提假设)同义重复。
● prerequisite前提假设，contingency偶然性，postulate前提假设，confirmation证实，discrepancy差异，corroboration证实。答案选AC。
● 注：这里confirmation和corroboration是干扰项，同表示“证实”。