more people of tubereulosis(结核病)than of any other disease caused by a single agent.this has probably been the case in quite a white.during the early stages of the industrial revolution.perhaps one in every seventh deaths is europe’s crowded cities were caused by the disease.from now nt,though,western eyes,missing the global picure,saw the trouble going into decline.with occasional breaks for war,the rates of death and infection in the europe and a merica dropped steadily through the 19th and 20th centuries.in the 1950s,the introduction of antibiotics(抗菌素)strengthened the trend in rich countries,and the antibiotics were allowed to be imported to poor countries.medical researchers declared victory and withdrew.
they are wrong.in the mid-1980s the frequency of infections and deaths started to pick up again around the world.where tuberculosis vanished,it came back;in many places where it had never been away,it grew better.the world heath organization estimates that 1.7 billion people(a third of the earth’s population)suffer from tuberculosis.even the infection rate was falling,population growth kept the number of clinical cases more or less constantly at 8 million a year.around 3 million of those people died,nearly all of them in poor countries.
writing (30)minutes
directions:for this part,your are allowed thirty imnutes to write a letter suppose you zhang ying.write a letter to xiao wang,a schoollmate of yours who is going to visit you during the week-long holiday.you should write at least 120 words according to the suggestions given below in chinese.
1.表示欢迎
2.提出对度假安排的建议
3.提醒应注意的事项
a letter to a schoolmate
june 23,2001