在整理问卷对量化资料进行分类编号时,所采用的分类间隔少比分类间隔多好。
参考答案:错
It was not ______she took off the glasses ________ I realized she was a famous film star.
A.when; that
B.until; that
C.until; when
D.when; until
对汞可监测功能的植物是()。
A.女贞
B.向日葵
C.棉花
D.茉莉