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单项选择题

“Inferred information” of a listening passage refers to ________
A、The general information that contains the main idea
B、The hidden information that cannot be found directly
C、The detailed information that is described specifically
D、The complicated information that is not easy to understand

问答题

写出下列植物的种或属的保护级别，请填写“一级”或“二级”：Metasequoia  glyptostroboides