প্রশ্ন ও উত্তর
One of the following metals, which one pollutes the air of a busy city?
সাধারণ বিজ্ঞান Basic Information of Daily Science, Inventions and... 07 Oct, 2020
প্রশ্ন One of the following metals, which one pollutes the air of a busy city?
সঠিক উত্তর
lead
মন্তব্য
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