长丝弓 发表于 2021-12-30 13:56
这题A正确 that chemical insecticides have often spread thousands of miles from where they were origi ...
RayMBAGmat 发表于 2021-12-31 09:31
嗯,谢谢,我知道A正确。只是不知道B的成分
欢迎光临 ChaseDream (https://forum.chasedream.com/) | Powered by Discuz! X3.3 |