新概念第四册 Lesson 38 Water and the traveller
Lesson 38 Water and the traveller
水和旅行者
First listen and then answer the following question.
听录音,然后回答以下问题。
What does this text describe?
Contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposal into the sources themselves, leakage of sewage into distribution systems or contamination with industrial or farm waste. Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap. Intermittent tap-water supplies should be regarded as particularly suspect.
Travellers on short trips to areas with water supplies of uncertain quality should avoid drinking tap-water, or untreated water from any other source. It is best to hot drinks, bottled or canned drinks of well-known brand names -- international standards of water treatment are usually followed at bottling plants. Carbonated drinks are acidic, and slightly safer. Make sure that all bottles are opened in your presence, and that their rims are clean and dry.
Boiling is always a good way of treating water. Some hotels supply boiled water on request and this can be used for drinking, or for brushing teeth. Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available. Refuse politely any cold drink from an unknown source.
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新概念第四册 | |
- 新概念第一册 Lesson 1 Excuse me!
- 新概念第一册 Lesson 17 How do you do?
- 新概念第一册 Lesson 3 Sorry, sir.
- 新概念第一册 Lesson 5 Nice to meet you
- 新概念第一册 Lesson 7 Are you a teacher?
- 新概念第一册 Lesson 9 How are you today?
- 新概念第一册 Lesson 11 Is this your shirt?
- 新概念第一册 Lesson 13 A new dress
- 新概念第一册 Lesson 15 Your passports, please.
- 新概念第一册 Lesson 19 Tired and thirsty