怎样区别undermine destroy sabotage weaken?

怎样区别undermine destroy sabotage weaken? 什么是undermine?weakensupport dramatize （ ）4.We must _____the factories from producing harmful gases.A.protect B.provide C.stop D.destro three-fourths of the building( )A.was destroyed B.is deatroyed C.were destro D.has destroyed 怎样区别斜拉桥,悬索桥 怎样区别转基因大米 怎样区别转基因土豆 怎样区别转基因玉米? 怎样区别H62黄铜 怎样区别是不是钢化玻璃 怎样区别tomato.potato 怎样区别铸造铜 怎样区别H59黄铜 塑料袋,pp 区别怎样, 聚乙烯聚丙烯怎样区别? 塑料袋,pp 区别怎样, 怎样区别山谷山脊 怎样区别干湿温度计