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4．各月的投资偏差是多少总投资偏差是多少
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Questions 20 and 21 are based on the following news. At the end of the news item, you will be given 20 seconds to answer the questions. Now, listen to the news. U.N. Secretary-General Kofi Annan would like to see
3．经甲方代表认定的索赔工期和费用补偿应为多少
2．监理工程师是否应该受理承包方提出的延长工期和费用补偿的索赔为什么
Having no language, infants cannot be told what they need to learn. Yet by the age of three they will have mastered the basic structure of their native language and will be well on their way to communicative competence. Acquiring their language is a most impressive intellectual feat. Studies of how children learn language generally agree that the most remarkable aspect of this feat is the rapid acquisition of grammar. Nevertheless, the ability of children to conform to grammatical rules is only slightly more wonderful than their ability to learn words. It has been reckoned that the average high school graduate in the United States has a reading vocabulary of 80,000 words which includes idiomatic expressions and proper names of people and places. This vocabulary must have been learned over a period of 16 years. From the figures, it can be calculated that the average child learns at a rate of about 13 new words per day. Clearly a learning process of great complexity goes on at a rapid rate in children. The word "reckoned" in Line 6 is closest in meaning to ______.
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