新型纳米材料MFe2Ox(3y D.SO2发生了置换反应

题型:选择题

问题:

新型纳米材料MFe2Ox(3<x<4)中M表示+2价的金属元素,在反应中化合价不发生变化。常温下,MFe2Ox能使工业废气中的SO2转化为S,流程如下:

则下列判断正确的是

A.MFe2Ox是还原剂

B.SO2是该反应的催化剂

C.x>y

D.SO2发生了置换反应

考点:质量守恒定律阿伏加德罗定律晶体、非晶体
题型:选择题

We had one class for computers when I was in school, which was also introduced new in school and all the students did not attend it. I took it because I had free period and was interested in taking it. In those days we could not image that computers will become so important in our lives otherwise most of the students would have joined the computer class.

Computers are beneficial for almost anyone and the present generation is growing in an atmosphere(氛围) where you need the computers for doing almost everything .If they are not made computer literate(精通) they will lag behind in all the activities. Nowadays almost all schools have some kind of computer courses for the students so that they learn the fundamentals of the computer. It will not be possible to do it if they don’t have computer classes. Most of the homes have personal computers now and most children are already aware of the basics before they join school.

Computing courses are also good for adults who are not familiar with the computer as most of the jobs which are available today have the use of computer in some way or the other. Adults who have not used the computer before are generally quite anxious, but an easy computing course will be able to change the way they think in a few weeks.

If you are interested, you can join a computing course which is longer and teaches you more than the basics, but you may have to spend more time in the completing course. They are very useful courses as it teaches you ways to use the fundamental programs which are typically used in various jobs.

It is also possible you may like to do the computing course for enjoyment as some of the classes are also free .There are courses which charge a fee for skills like graphic design and photo editing . They are a lot of fun too and may also be useful when you do a job , depending on the kind of career ,someone you choose or have . You will find these courses in the colleges, as well as online, if you already are familiar with the use of computer.

小题1:Most of the students didn’t attend the computer course probably because         .

A.they were not interested in computer

B.they were busy with their homework

C.they thought computers were useless

D.they didn’t have computers at all小题2:Which of the following is the main idea of the second paragraph?

A.The number of the computers is larger than before.

B.The computers are very important in our daily life.

C.The students are forced to learn computer at school.

D.Everyone has a personal computer at home.小题3:According to this passage most of the jobs can be done by    .

A.attending computing courses

B.changing the way people think

C.learning all aspects of the computer

D.using the computer小题4:The underlined pronoun “it” (in paragraph 4) refers to        .

A.the computer course

B.the usage of word

C.the basic program

D.the word processing小题5:Which of the following is TRUE according to the last paragraph?

A.It costs some money to learn skills of computer.

B.All the classes for enjoyment are free online.

C.Photo editing is always useful to your job.

D.It is difficult to look for computer courses.

题型:选择题

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A、尼罗河是世界第一大河  

B、刚果河是世界水能资源最丰富的河流  

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D、赞比西河上有著名的莫西奥图尼亚瀑布

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历史唯物主义

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在宏的调试中,使用_______________,可以观察宏的流程和每一个操作的结果。

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患儿,3个月,体重5kg。护士为其计算每日所需8%糖牛乳的剂量为

A.500ml
B.550ml
C.600ml
D.650ml
E.700ml

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