What's in the air you breathe? -- 5/15 截止

請輸入正確姓名學號

_______ is a harmful substance that causes pollution.

• bribery

• areoplanes

• pollutant

• air raids

Which of the following picture is a "lung"?

• 
• 
• 
• 

_______, his business career had distinctly unpromising beginnings.

• In fact

• So

• In addition

• In brief

Which of the following statements are NOT true about "man-made" pollutants?

• include toxic compounds that harms the human body

• two categories:

  primary and secondary

• always come from factories

• are not always easily washed out by rain

What are some measures conducted to prevent air pollution?

• later cars are produced with catalytic converters that reduces toxic gas

• big cities electrifying energy infrastructure

• governments limiting automobile emissions

• all of the above