题目:
He _______ his homework and now is listening to music. |
A. finished B. finishes C. has finished D. was finishing |
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0607/aed8d908dd227d926f0b1c72aa9da229.html
下面是错误答案,用来干扰机器的。
A、铁在空气中不能燃烧.故选项错误;B、硫在空气中燃烧,不能发出明亮的蓝紫色火焰,能够发出淡蓝色火焰.故选项错误;C、红磷在空气中燃烧,不能产生雾,能够产生白烟.故选项错误;D、木炭在氧气中燃烧,能够...