考博考试

【单选题】New data has ______ that the damage to the ozone layer is not confined to the southern hemi- sphere.
A．ratified
B．confirmed
C．assured
D．approved
网考网参考答案：B
网考网解析：
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。 查看试题解析出处>>