萃取塔的退料方法正确的是()。A、继续进碳四 B、继续进萃取水,顶出塔内碳四物料 C

题型:多项选择题

问题:

萃取塔的退料方法正确的是()。

A、继续进碳四

B、继续进萃取水,顶出塔内碳四物料

C、萃取水进甲醇回收塔

D、顶出塔内碳四物料,继续进萃取水

考点:甲基叔丁基醚(MTBE)装置操作工甲基叔丁基醚中级操作工甲基叔丁基醚中级操作工题库
题型:多项选择题

New York is one of the last large American cities to have some of its policemen on horseback. The New York police have 170 horses working in certain parts of the city. The horses are expensive to feed, but it is even more expensive to look after them. Because the horses must walk on the streets, they need special horseshoes. In fact , they need more than 8,000 of them each year. Every police horse in New York gets new shoes every month. Keeping these shoes in good repair is the job of six blacksmiths. There are only about thirty-five of these blacksmiths in the whole United States.

The cost of shoing a horse is between twenty dollars and thirty-five dollars, and it takes a good blacksmith two or three hours to do the job.

A blacksmith’s job is not an easy one. He must be able to shape a shoe from a piece of metal and then fit it to the horse’s foot. The blacksmith must bend over all the time when he is fitting the shoe and must hold the weight of the horse’s leg while he works. Clearly, a blacksmith must be very storng. But even more important, he must be able to deal with horses---for before the blacksmith can begin his work, he has to get the horse to lift its leg.

One of the blacksmiths in New York is James Corbin. He came to the country from Ireland in 1948. He not only makes horseshoes for the police but also works for a group of horse owners near the city. Corbin became interested in blacksmithing because his father did it, and,as the puts it, “It’s a good way to make a living.”

小题1:According to the reading passage, a blacksmith must be likely a______ man.

A.clever

B.rich

C.strong

D.lucky小题2:James Corbin became a blacksmith because he__________.

A.was interested in horses

B.was needed by the policemen

C.drew a picture of the horseshoe

D.had a make a living小题3:In the reading passage “to shape a shoe” is to__________.

A.fit it on the horse’s foot

B.use it for two or three hours

C.make the from of a horseshoe from a piece of metal

D.draw a picture of the shoe小题4:The best title for the passage is “__________”.

A.Policemen on Horseback

B.Blacksmiths and Horseshoeing

C.James Corbin, a Blacksmith

D.Horseshoeing is a Good Way to Make a Living小题5:Which of the following is true?

A.Only a few large American cities have some policemen on horseback.

B.New York is the only city in America to have some policemen on horseback.

C.Policemen on horseback enjoy travelling around the United States.

D.Policemen on horseback are less expensive than those in cars.

题型:多项选择题

选择填空。

What ______ did she ______ on last Sunday? [ ]

A.activities, did

B.activity, do

C.activities, do

题型:多项选择题

下列叙述正确的是:①用氨水清洗做过银镜反应的试管;②用分液漏斗分离硝基苯和水的混合物;③用pH试纸测定新制氯水的pH;④用碱式滴定管量取20.00mL 0.1

mol/LKMnO4溶液;⑤不慎将苯酚溶液沾到皮肤上,立即用NaOH稀溶液清洗;⑥含有离子键的化合物一定为离子化合物;⑦用托盘天平准确称取29.25gNaCl配制500mL 0.1mol/L的NaCl溶液;⑧Na2CO3CO2白色沉淀,说明元素的非金属性:Cl>C>Si;⑨从试剂瓶中取出的任何药品,若有剩余不能再放回原试剂瓶;⑩胶体和溶液的本质区别是分散剂微粒直径的不同。

A.②⑥⑩

B.①③④⑤⑧

C.②⑥

D.③④⑤⑥⑦⑨

题型:多项选择题

未经治疗的牙髓炎最常见的转归是()

A.牙髓萎缩

B.牙髓纤维变性

C.牙髓坏死

D.牙髓钙化

E.牙内吸收

题型:多项选择题

骑跨式外伤最易损伤 * * 是()

A.阴茎部

B.球部

C.膜部

D.前列腺部

E.膜上部

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