脱硫系统中的补充水主要来自哪些地方？

绵阳市“全国文明村”江油白玉村果农王灿收获枇杷20吨，桃子12吨，现计划租用甲、乙两种货车共8辆将这批水果全部运往外地销售，已知一辆甲种货车可装枇杷4吨和桃子1吨，一辆乙种货车可装枇杷和桃子各2吨。

（1）王灿如何安排甲、乙两种货车可一次性地运到销售地？有几种方案？

（2）若甲种货车每辆要付运输费300元，乙种货车每辆要付运输费240元，则果农王灿应选择哪种方案使运输费最少？最少运费是多少？

在Linux中，可以移动文件的命令是 (48) ，可以用于改变属主的命令是 (49) 。

A．chmod
B．chown
C．chgrp
D．touch

Louis Armp had two famous nicknames. Some people called him Bagamo. They said his mouth looked like a large bag. Musicians often called him Pops, as a sign of respect for his influence on the world of music.
Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz had been invented in the city a few years before his birth. Armp often said, "Jazz and I grew up together. "
Armp showed a great talent for music when he was taught to play the comet at a boy’s home. In his late teens, Armp began to live the life of a musician, lie played in parades, clubs, and on the steamboats that traveled on the Mississippi River. At that time, New Orleans was famous for the new music of jazz and was home to many great musicians. Armp learned from the older musicians and soon became respected as their equal.
In 1922 he went to Chicago. There, the tale of Louis Armp began. From then until the end of his life, Armp was celebrated and loved wherever he went. Armp had no equal when it came to playing the American popular song.
His cornet playing had a deep humanity and warmth that caused many listeners to say, "Listening to Pops just makes you feel good all over. " He was the father of the jazz style and also one of the best known and most admired people in the world. His death, on July 6th 1971,was headline news around the world.

Which would be the best title for the text

A．The Invention of the Jazz Music
B．The Father of the Jazz Style
C．The Making of a Musician
D．The Spread of Popular Music

一位27岁妇女，每年均有过敏性鼻炎发作，时有哮喘发作。皮试花粉和尘螨阳性，她已经接受了三年特异性抗原的免疫治疗。现已妊娠二个月，对于她的中、重度症状治疗，不应该包括

A．每日口服astemizole
B．继续给予花粉或尘螨的特异性抗原免疫治疗
C．监测环境中灰尘的限度
D．用生理盐水行鼻灌洗和应用扑尔敏
E．在有青草花粉的季节，症状严重恶化时选用短程的口服糖皮质激素

造成血细胞比容测定降低的原因有（）

A.红细胞缩小

B.红细胞减少

C.标本有溶血

D.离心管太细

E.白细胞、血小板增多