问题
选择题
The film Mei Lanfang, Li Ming plays the starring role,has again drawn the world’s attention to our traditional Chinese art.
A．what
B．that
C．which
D．where
答案
答案：D
考查定语从句。where Li Ming plays the starring role是非限制性定语从句，where在从句中作状语，相当于in which。
由铀239
经过4次β衰变而产生
经过两个半衰期后其质量变为15 g
和
的核反应前后，原子核的核子总数减少