除焦时,两旁应无(),以便有炉烟外喷或灰焦冲出时,工作人员可以向两旁躲避。
A.障碍物
B.防护隔离
C.无关人员
D.可将水喷成雾状的器具
参考答案:A
What did he do with his old car().
A.He maintained the old car.
B.He planned to replace the old car.
C.He discarded the old car.
D.He had his old car fixed.
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