However， at times this balance in nature is ________， resulting in a number of possibly unforeseen effects.
However， at times this balance in nature is ________， resulting in a number of possibly unforeseen effects.
A.troubled
B.disturbed
C.confused
D.puzzled
正确答案是B
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明：本文由翰林刷题小程序授权发布，如需转载请注明出处。