问题补充：
Science is more than a collection of unrelated facts; to be meaningful and valuable, must be arranged to show generalized character.
A. which
B. those
C. it
D. they
答案：
A. which
B. those
C. it
(答案→)D. they
解析：句意：科学不只是收集一些无关的事实；为使这些事实有价值和有意义，必须对它们进行处理使其具有普遍性的特征。they指代前面的facts。复数概念.不可以用it，如用的话就指科学了,那样意思不通。因为句中用了分号，所以此处不能构成定语从句，A不对。这里不是特指那些事实，所以B不可以选。
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