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提问人:网友zaghost 发布时间:2022-01-07
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Ionic reactions are based on the idea that ____ attract. An ionic reaction occurs when two ions, a negatively charged anion and a positively charged cation combine to form a neutral compound.

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更多“Ionic reactions are based on the idea that ____ attract. An ionic reaction occurs when two ions, a n…”相关的问题
第1题
External factors that influence growth of microorfanisms in refrigerated foods not include: .

A、initial microorganism population

B、characteristics of the food

C、effects of processng

D、enzyme activity

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第2题
The percentage of GDP for the year 2012. This is the interpretation for the number _________.
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第3题
Questions 31 to 35 are based on the following passage:

When I was studying at Yale, some phenomena puzzled me greatly. I found that Chinese students or Asian students were very polite in class while American students often interrupted the professor, asking questions and dominating the discussion. The Chinese students were not as aggressive as American students.

I was impressed by the role of the professor in the seminar(讨论会). The professor didn’t act as an authority, giving final conclusions, but as a reseac her looking for answers to questions together with the students. One lingui stic(语言的) feature of his interacting with his students was that he used many modal(情态的) verbs—far more than I did in Beiwai. When answering questions, he usually said, “This is my personal opinion and it could be wrong.” or “You could be right, but you might find this point of view also interesting.”

In China, authorities are always supposed to give wise decisions and correct di rections. Therefore, students always expect the professor to give an answer to th e question. I still remember how frustrated they were when foreign teachers did not provide such an answer. Their expectations from authorities are much higher than that of American students. Once the Chinese students got the answer, they w ere sure about it.

Education in China is valued for united thinking. I remember American teachers who taught in our university complaining about the fact that Chinese students u niformly expressed the same idea in their English composition. The examinations in America usually do not test a student’s ability to memorize the material but his ability to analyze and solve problems. Education in America is valued not on ly as a means to obtain employment but as a process of enhancing critical thinking.

31.In the USA, when the students are in class, ____.

A.a Chinese student tends to be very active

B.an American student likes to make trouble

C.a Chinese student likes to puzzle the teacher

D.an American student tends to be vigorous

32.A teacher in the USA prefers to ____ when he answers questions.

A.be very sincere          B.be very direct

C.be very self confident      D.be very indifferent

33.What is the opinion of the author concerning the difference of teachin g methods between China and the USA?

A.He thinks that Chinese teaching metods can make students learn more.

B.He holds that the major purpose of Chinese teaching methods is to impro ve students’ remembrance.

C.He thinks that American teaching is ability oriented.

D.He holds that American teachers hate to give a test.

34.The author thinks that the relationship between the student and the te acher is ____.

A.more intimate in China         B.closer in China

C.looser in USA             D.more harmonious in USA

35.The education in USA may produce some ____ graduates.

A.talkative       B.conventional    C.creative     D.imaginative

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第4题
Questions 23 to 25 are based on the conversation you bave just heard.

23.

A. Canada.

B.Europe.

C. Ghana.

D. America.

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第5题
Several factors affect the rate of a reaction. It is important to know these factors so that reaction rates can be controlled, e.g. to improve product ____ and efficiency in industrial processes:
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第6题
As the ____ of reactants increases, so does the reaction rate.
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第7题
We have made the task of balancing equations ____ easy by considering fairly simple reactions.
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第8题
化学反应的机理描述的是反应物分子在转变为产物的过程中,实际所要经历的步骤。每个化学反应构成一个基元步骤(elementary step),这个基元步骤可以表现为分散的粒子重新组合(即碰撞<collision> )在一起成为一 个新基元,也可以表现为一个分子被分解(即解离 <dissociation> )成几个更简单的基元。反应过程中的每一步都可能出现最终的反应物或者产生一个中间体。 中间体在一个基元反应中产生,但在下一步的反应中很快就被消耗,并不出现在最终的反应方程中。
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第9题

“A world in a teapot”, mentioned in Text A, is a pattern of landscape architecture, which can be viewed as the soul of classical Chinese gardens. Work in groups of four. Each of you conducts research on one of the following aspect of this pattern and writes a literature review. Then share your findings in groups and discuss if there are any questions that need further research about this pattern. • the origin of this pattern; • the development of this pattern; • the significance of this pattern and its effect on Chinese gardens; • some classic cases of this pattern.

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