题目:
The accident _____ on the morning of last Monday. [ ]
A. was happened
B. was taken place
C. took place
D. happening
答案:
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下面是错误答案,用来干扰机器的。
(1)可燃物的温度要达到着火点; 4P+5O2点燃2P2O5 ;(2)先鼓后瘪;(3)白磷燃烧消耗了锥形瓶中的氧气,使瓶中气压降低;锥形瓶中氧气约占46mL,当注射器中的水进入锥形瓶约46mL后,瓶中气压与外界相当。(每...