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在队列研究中，适宜计算累汁发病率的条件是
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Milk has become a popular drink for modem Chinese, not only is its nutritional (营养的) value appreciated, it seems even to have taken the role making the whole nation strong. Milk industry has only about 180 years of history among the Hah people. For a long time, milk was considered a luxury (奢侈的 )drink by common people. A widespread saying in the country was that Japan used a cup of milk to strengthen the constitution (体格) of its people. That sounds reasonable because the rich "Ca" in milk definitely benefits the constitution.The average annual consumption per capita in Japan has risen from less than 10 kilograms immediately after World War II to 68 kilograms today. The average height of Japanese has increased by 11 centimeters during this period. The Chinese Government also hopes to improve the constitution of local people, and since milk is the most obvious nutritious food, it has naturally been picked up. But due to tradition, Chinese people are not in the habit of drinking milk regularly. The annual output of milk in the country is about 10 million tons, compared with an output of alcohol reaching 8 million tons. The annual milk consumption per capita is about 7 kilograms in China while the world’s average is about 100 kilograms. The government has noticed the huge gap and plans to raise consumption to 10 kilograms per capita by 2005 and 16 kilograms by 2010. The government has also started plans for "school milk" since the beginning of this century. Since the beginning of the 21 st century, the government has started（）
At the turn of the century it is estimated that a student living alone requires on average A$12 000 (Australian dollars)in living expenses for each year of study in Australia. Of course, these costs increase with time.Upon arrival, students should have funds in excess of the average to cover the cost of text books and establishment expenses such as rental payment and basic furniture items. The amount spent on food, recreation, and entertainment expenses will vary according to requirements, budget, and location.Those who are prepared to live in shared accommodation, which may not be suitable for all, might manage on AS 10 000 per year. It is preferable for overseas students whose English is in need of practice to take advantage of living in situations with native speakers whenever possible. However, sharing with friends who are easy to communicate with is probably more sensible at first.The above figures do not include the cost of large non-essential items such as household equipment or a car. Owning and maintaining a motor vehicle is expensive in Australia. Insurance is compulsory and costly, and parking both on and off campus can be a problem requiring additional expense. It is not advisable for a student to own a car unless it is absolutely necessary. A reasonable second hand car can cost more than A$4 000.Educational institutions are almost always serviced by reliable public transport. The university and college campuses within the major cities are well served by public buses. In addition, the larger cities have extensive train systems. For example, in Sydney, most college and university campuses are only 10 or 20 minutes from a rail station. Which of the following is TRUE according to the passage（）
By the end of this year, they（）the construction of the subway.
Seldom（）any mistake during his past ten years of service there.
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