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在需求规约基本格式中______是文档的技术核心。

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Question 9 to 11 are based on the conversation you have just heard. What do we learn from Maria’s phone call this morning （）

A. She decided to get married in three years.
B. She insisted that Eric pursue graduate studies.
C. Her father said she could marry Eric right away.
D. Her mother objected to Eric’s flying lessons.

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Passage One Questions 16 to 18 are based on the passage you have just heard. What gesture do Bulgarians and Greeks use to express negative responses （）

A. Waving one’s hand.
B. Nodding one’s head.
C. Holding up the forefinger.
D. Turning the right thumb down.

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Passage Two Questions 19 to 21 are based on the passage you have just heard. What do we learn about Pantcha Maya’s family of three years ago （）

A. They grew wheat and corn on a small farm.
B. They shared a small flat with their relatives.
C. The children walked to school on dirt roads.
D. They had to beg for foot after the harvest.

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IPO图描述分层图中一个模块的输入、输出和______。

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