Some scientists have questioned the theory ______ CO2is causing dangerous global

题干

Some scientists have questioned the theory ______ CO₂is causing dangerous global warming.
A. which B. what C. that D. why

上一题下一题 0.65难度单项选择更新时间:2012-05-26 06:06:21

小学学科试题库

初中学科试题库

高中学科试题库