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【多选题】
农药使用要合理,如下做法是正确的是
A.
要按照农药标签上规定的用量喷洒，不要过量使用
B.
蔬菜上可能有农药残留，最好在清水中多浸泡一会，烧熟或热水焯后再凉拌
C.
植物生长调节剂可以促进作物生长，什么时候都可以施用。
D.
现在病虫害发生严重，最好把几种农药混在一起喷洒效果好。
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