输煤皮带机主要由哪些部件组成？
存储管理的主要目的在于（）。 ["协调系统的运行","提高主存空间利用率","增加主存的容量","方便用户和提高主存利用率"]
My ship’s engine responds well to telegraph orders and takes about 80 seconds to reverse from full speed ahead to full speed astern.This sentence（）. ["indicates the engine's particulars","tells the engine's function","shows the engine's type","refers to the engine's informatio"]
The symbol (GB786√1-93) at right side represents （） ["overflow valve","reducing valve","relief valve","sequence valve"]
支行个人业务分管行长应亲自参与（）以上大客户营销。 ["100万","200万","300万","500万"]
例举形成照片中河谷地形的2个原因。
