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Scenario 情景Li Ying (Student A) is doing an assignment, but there are some problems with her computer from time to time, so she calls her friend Wang Li (Student B) who majors in computer for help, and Wang Li helps her to solve the problems.Task 任务Make up a dialogue based on the following information:
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图示梁的抗弯刚度为EI，则图示荷载作用下B截面转角大小为 A、0 B、 C、 D、
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