单选题_____AeffectingBaffectingCdefectingDperfecting
单选题
_____
A
effecting
B
affecting
C
defecting
D
perfecting
参考解析
解析：
effect影响；affect影响；defect过失。缺点；perfect修改，使完美。这里是讲正在影响美国的变化。故选B。
effect影响；affect影响；defect过失。缺点；perfect修改，使完美。这里是讲正在影响美国的变化。故选B。
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