烃泵一般采用叶睡和Y型离心油泵。在实际工作中通过泵获得的压头叫扬程，常用单位为kg/

据《晋书》记载：“人士流移，考详无地，故立九品之制,茬且为一时选用之本耳。其始 造也，乡邑清议，不拘爵位，褒贬所加，足为劝励，犹有乡论余风。”另据《宋史》记载，“军中仓卒，权立九品，盖以论人才优劣，非为世族高卑。因此相沿，遂为成法，自魏至晋,莫之能改。 州都郡正,以才品人，而举世人才,升降盖寡，徒以凭借世资,用相陵驾。”两则材料对九品中正制评价的相同点是 

A．该制度实行之初能依据人才优劣确定品第

B．该制度选官用人只重门第

C．该制度是士族地主垄断 * * 的工具

D．该制度具有封闭性、凝固性

吸收是指药物进入（）（P341-23）

A、胃肠道的过程

B、靶器官的过程

C、血液循环的过程

D、细胞内液的过程

E、细胞外液的过程

（）能降低氧气的含量，增加二氧化碳或痰气的含量，从而减弱鲜活原料中化学成分的变化，达到保藏的目的，此方法多用于水果、蔬菜、粮食的保藏和鲜蛋类

Most people have no idea of the hard work and worry that gointothe collecting of those fascinating birds and animals that they pay to see in the zoo.One of the questions that is always asked of me is 1 I became an animal collector in the first 2.The answer is that I have always been interested in animals and zoos.According to my parents, the first word I was able to say with any 3 was not the conventional “mamma” or “daddy”,4 the word “zoo”, which I would 5 over and over again with a shrill 6 until someone, ingroupsto 7 me up, would take me to the zoo.When I 8 a little older, we lived in Greece and I had a great 9 of pets, ranging from owls to seahorses, and I spent all my spare time 10 the countryside in search of fresh specimens to 11 to my collection of pets.12 on I went for a year to the City Zoo, as a student 13 , to get experience of the large animals, such as lions, bears, bison and ostriches,14 were not easy to keep at home.When I left, I 15 had enough money of my own to be able to 16 my first trip and I have been going 17 ever since then.Though a collector's job is not an easy one and is full of 18 ,it is certainly a job which will appeal 19 all those who love animals and 20.

请在20处填上正确答案（）

A.excursion

B.travel

C.journey

D.Trip

老年患者宜选用的抗菌药物为（）

A.阿莫西林

B.妥布霉素

C.依替米星

D.万古霉素

E.去甲万古霉素