问题补充:
As a result of is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
A. it
B. what
C. which
D. that
答案:
A. it
(答案→)B. what
C. which
D. that
解析:句意:由于在物理学和化学上已知的知识的原因,科学家们已经能够在生物学和医药上取得重要发现。what 引导宾语从句,在从句中做主语。在宾语从句中,which 是哪一个,that不做成分。故选B。
考点: 考查从句关系词的用法。