在0.1mol•L-1的醋酸溶液中,要使溶液的pH增大,同时又使醋酸根离子浓度增

题型:选择题

问题:

在0.1mol•L-1的醋酸溶液中,要使溶液的pH增大,同时又使醋酸根离子浓度增大,可加入的试剂是( )

A.CH3COONa浓溶液

B.1mol•L-1氨水

C.1mol•L-1H2SO4

D.2 mol•L-1 CH3COOH

考点:芳香烃的通式卤代烃苯的同系物
题型:选择题

在溴化锂溶液中加入表面活化剂,目的是( )。

A.增加真空度
B.防腐蚀
C.强化传热介质
D.减少氧的侵蚀

题型:选择题

西门子在更换OCR盘后,有SD告警出现,但收光功率正常,则可判定刚换的OCR有问题。

题型:选择题

某供应商数据库中的供应关系为 SPJ(供应商号,零件号,工程号,数量),如下命令查询某工程至少用了 3 家供应商(包含 3 家)供应的零件的平均数量,并按工程号的降序排列。 SELECT 工程号,(14) FROM SPJ GROUP BY 工程号 (15) ORDER BY 工程号 DESC;

A.HAVING COUNT(DISTINCT(供应商号))>2

B.Where COUNT(供应商号)>2

C.HAVING(DISTINCT(供应商号))>2

D.Where 供应商号 >2

题型:选择题

阅读理解

     There is more and more worry about the growing threat of globalization, which is accompanied by

those warnings that the rich pattern of local life is being undermined(破坏), and many dialects and

traditions are becoming extinct. But stop and think for a moment about the many positive aspects that

globalization is bringing. Read on and you are sure to feel comforted, ready to face the global future.

     Consider the Internet, that good example of our shrinking world. Leaving aside the worries about

political extremism, even the most narrowminded must admit that the net offers a lot of benefits, not just in

terms of education, the sector(部分)for which it was originally designed, but more importantly on a global

level, the spread of news and comment. It will be increasingly difficult for politicians to misinform the

public, as the oppressed(被压迫的)will not only find support and comfort, but also be able to organise themselves more effectively.

     MTV is another global provider that is often criticized for imposing(强加)popular culture on the

unsuspecting millions around the world. Yet the viewers' judgment on MTV is undoubtedly positive; it is

regarded as necessary by most of the global teenage generation who watch it, a vital part of growing up.

And in the final analysis, what harm can a few songs and videos cause?

     Is the world dominance(绝对优势)of brands like Nike and Cocacola so bad for us, when all is said

and done? Sportswear and soft drinks are harmless products when compared to the many other things that have been globally available for a longer period of time-heroin and cocaine, for example. In any case, just because Nike shoes and Coke cans are for sale, it doesn't mean you have to buy them-even globalization

cannot take away people's free will.

     Critics of globalization can stop presenting their doom and gloom statements. Life goes on, and has

more to offer for many citizens of the world than it did for their parents' generation.

1. Some people feel sad about globalization because they believe it will ________.

A. affect the rich local life

B. bring threat to the world peace

C. change their present difficult lifestyle

D. increase the size of people speaking dialects

2. Internet was originally designed ________.

A. to spread news and comment

B. to get support and comfort

C. to organise the oppressed more effectively

D. to promote education

3. Which of the following is true according to the passage?

A. The Internet makes people worried about political extremism.

B. Nike and Cocacola shouldn't have caused so much worry.

C. All of the global teenage generation think that MTV is a necessary and important part for their growing up.

D. Sportswear and soft drinks cannot be compared with drug.

4. Which of the following could be the best title of the passage?

A. Globalization is standardization(标准化)

B. Globalization: don't worry, be happy

C. Globalization: like it or change it

D. Globalization brings equality

题型:选择题

隧道内漏水的整治原则是什么?

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