Pale is cited as an example in the second paragraph to illustrate that（）
A. famous soccer players live in slum areas
B. people in poor areas are born with some unique quality
C. children in poor areas start playing football at the age of 3 or 4
D. many great soccer players come from poor areas
相传我国古代大诗人自居易每次作诗后，都会读给一位目不识丁的老太太听。白居易这样做的目的是（）。
Although the arguments were rational,he was not convinced. 1（）
A. sensitive
B. true
C. reasonable
D. persuasive
政府采购项目的采购合同自签订之日起（）个工作日内，采购人应当将合同副本报同级政府采购监督管理部门或有关部门备案。
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