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简要回答管理系统的组成。

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下颌骨骨折最易引起呼吸道阻塞的是哪个部位？

A. 下颌角骨折
B. 双颌孔骨折
C. 髁颈部骨折
D. 髁孔部骨折
E. 正中骨折

You should spend about 20 minutes on this task. The graph and bar chart below show the average monthly rainfall and temperature for one region of East Africa. Summarise the information by selecting and reporting the main features, and making comparisons where relevant. Write at least 150 words. Average monthly rainfall and temperatures

唐代时期我国的船只已到达了斯里兰卡。()

商品降权可以在多久内申诉？