Questions 1-6 Choose the appropriate letters A-D and write them in boxes 1-6 on your answer sheet. *

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问题 Questions 1-6
Choose the appropriate letters A-D and write them in boxes 1-6 on your answer sheet.

*

选项 A、toxic chemicals can pass from air to water.
B、pollution is caused by dishwashers and baths.
C、city water contains insufficient chlorine.
D、household appliances are poorly designed

答案B

解析 Para 4: ... baths, showers ... can all be significant sources of indoor pollution
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