A-A+
The people for the experiment were chosen comp
问题详情
The people for the experiment were chosen completely ______.
A．at length
B．in essence
C．at random
D．in bulk
参考答案
正确答案：C
解析：confirm证实。句意：新的数据证实臭氧成层的破坏并不限于南半球。ratify批准，许可；assure保证；approve同意，赞成。
