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各种性质与类型的公共建筑一般都是由()这三类功能与空间组合而成。
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产品成本是由费用构成的，因此企业发生的费用和产品成本是等同的。 ()
在我国,印花税票有9种,其中票面金额最小的为人民币()。
汇总缴纳印花税的期限由当地税务机关确定,但最长不得超过()。
听力原文： A United Nations report says sub-Saharan Africa is the only region in the world where extreme poverty continues to grow over a recent twenty-year period. In its annual report Tuesday, the UN Industrial Development Organization says forty-seven percent of all people living in sub-Saharan Africa subsist on less than one dollar a day. The group said that figure increased by five percentage points in the years between 1981 and 2001. In contrast, the group said the number of people worldwide living in absolute poverty fell from forty percent to twenty-one percent during that same time.
How many people lived in extreme poverty in sub-Saharan Africa in 1981？
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