冲天炉锰的烧损率试算式是（）。A.炉料锰总成分—铁水锰总成分 B.铁水锰成分÷炉料锰

某女患者，43岁，反复视物复视3年，伴全身无力，吞咽困难半个月入院，既往史无特殊，诊断重症肌无力。

关于本病，哪些肌肉不受累

A、眼外肌

B、眼内肌

C、呼吸肌

D、四肢肌肉

E、咀嚼肌

Have you ever considered a trip to Shangri-la!? The British writer James Hilton described a beautiful kingdom 小题1:.where three rivers joined together, steep mountains reached to the sky, and fields of long grass covered the earth. Three mountains, Meili, Baimang and Haba, which are covered with snow, tower over the land. Below the mountain, the sunshine reflects on the many lakes, 小题2:.making them shine like diamonds against the rich countryside. Lakes, surrounded by vast grassland, look like jewels. Sheep, cows and horses feed freely on the green grass and 小题3:.forests around are home to lots of birds and animals. In this peaceful world, 小题4:. 人们与大自然和谐相处and the noise and the worry of the outside world are forgotten. Nature has provided Shangri-la with endless natural treasures, making the land a happy home for the local people. In this perfect world lived people who had discovered 小题5:.如何永葆青青.The weather changes so quickly that people say you can experience four seasons in one day. The best time to visit Shangri-la are spring and autumn when the temperature is at it mildest.

甲、乙、丙、丁分别是MgSO₄、Al₂(SO₄)₃、BaCl₂、NaOH四种物质中的一种。若将甲溶液滴入丙溶液中，发现有白色沉淀生成，继续滴加则沉淀消失；若将甲溶液滴入乙溶液中，无明显现象发生。据此可推断丁物质是[ ]

A．MgSO₄

B．Al(SO₄)₃

C．NaOH

D．BaCl₂

热介质油品质下降的原因，下列说法不正确的是（）

A、热油系统进水

B、热油膨胀罐密封氮气压力高

C、机械杂质

D、结焦

将车票送到集中取票点，可收取送票费（）/人次。

A.5元

B.3元

C.6元

D.8元