Tipping
The British Tourist Authority gives the following summary of usual practice. There are no fixed rules and the amount you give can reflect whether you feel you have received good or only average service.
Hotels: many hotel bills include a service charge, usually 10-12.5%, but in some
larger hotels, 15%. Where a service charge is not included, it is usual to
divide 10-15% of the bill among the staff who have given a good service.
Porterage (搬运) : 20p per suitcase (包).
Taxis: 10-15% of the fare.
Hairdressers: 50p plus about 50p to the assistant who washes your hair.
Theatres/cinemas
and petrol(gas) tips are not expected.
stations
The summary of usual practice on tipping is given by (1) .
When the hotel bill does not include a service charge, it is usual to give (2) of the bill to the service persons.
When you have your hair cut in a shop, you should give
The United Nations, an accepted authority on population levels and trends, estimates that the world population reached 5.3 billion in 1990, and is increasing annually by more than 90 million persons. The rate of increase, 1.7 percent per year, has fallen below the peak rate of 2 percent per year attained by 1970. However, absolute yearly increments are not expected to start declining until after the year 2000.
Estimates of world population before 1900 are based on fragmentary (不全的；不完整的) data, but scholars agree that average population growth approached approximately 0.002 percent per year. Growth was delayed and influenced by climate, food supply, disease, and war.
Starting in the 17th century, great advances in scientific knowledge, agriculture, industry, medicine, and social organization made possible substantial increases in population. Inanimate (无生命的) energy gradually replaced human and animal labor. People slowly acquired the knowledge and means to control d
A. Past and Present Growth of Population
B. World Population
C. Some Factors on Population Influence
D. Population
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