汞的测定原理是基于基态汞蒸气对电磁波的吸收,其吸收的波长为() A.217.3nm

题型:单项选择题

问题:

汞的测定原理是基于基态汞蒸气对电磁波的吸收,其吸收的波长为()

A.217.3nm

B.253.7nm

C.238.3nm

D.228.8nm

E.283.3nm

考点:理化检验技术理化检验技术题库
题型:单项选择题

假设某数据表中有一个工作时间字段,查找1999年参加工作的职工记录的准则是( )。

A.Between # 1999-01-01 # And # 1999-12-31#

B.Between“1999-01-01”And“1999-12-31”

C.Between“1999.01.01”And“1999.12.31”

D.# 1999.01.01 # And # 1999.12.31#

题型:单项选择题

United States and Canada are multicultural countries with many national, religious and cultural differences, where people attach great importance to individualism—the uniqueness among people. Teachers value the qualities that make each student special and different. You can see such values through their educational systems. For example, students needn’t memorize lots of information. Instead, they work independently and find answers on their own. There are discussions for children to show their own ideas and opinions.

By contrast, people have the same language, history, and culture in most Asian societies. As a result, Asia’s educational system reflects society’s belief in group goals and purposes rather than individualism. Children in China, Japan, and Korea learn to work together and help one another in assignments. And the teaching methods are often very formal and serious. In class, teachers give lectures while students listen and take notes. Discussion is replaced by reciting rules of information that have been memorized.

These two systems both have advantages and disadvantages. One advantage in Japan is that there is much more math and science than American students learn by the end of high school. In addition, students study more hours each day and more days each year than North Americans do. The difficult system also prepares students for a society that place emphasis on discipline and self-control. However, while memorization is an important learning method in Japanese schools, yet many students admit forgetting much of the information that they have memorized after exams.

On the other hand, the educational system in North American has an advantage that students learn to think for themselves, which prepares them for a society that values creativity. The disadvantage is that when they graduate from high school, they haven’t recited as many basic rules and facts as students in other countries have.

小题1:People in multicultural countries such as the US or Canada lay more stress on __________.

A.team work

B.self-control

C.discipline

D.individualism小题2:What is the advantage of the educational system in North America?

A.There is not much discussion.

B.Learning to think for themselves

C.Learning much less math and science

D.They haven’t memorized basic rules and facts.小题3:Which words is most suitable to describe the author's attitude in writing this passage?

A.Supportive

B.Opposite

C.Objective

D.Subjective小题4:The main idea of this passage is___________.

A.cultural differences in countries such as the United States or Canada

B.comparisons of educational system between North America and Asia

C.there are more advantages of Asian education system of than that of North American

D.there are more disadvantages of Asian education system than that of North American

题型:单项选择题

《中国人民解放军军官军衔条例》确定了各级主官的基准军衔,其中正团职为上校,正营职为少校,正连职为上尉。

题型:单项选择题

用于存储DELETE和UPDATE语句所影响的行的副本的表是______。

A.UPDATED

B.INSERTED

C.SELECTED

D.DELETED

题型:单项选择题

B19型冷藏车的自重为()t。

A.37.0

B.38.0

C.39.0

D.45.0

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