下列常见食品中,呈弱碱性的是( ) A.泡菜(pH3.2~3.6) B.牛奶(p

题型:选择题

问题:

下列常见食品中,呈弱碱性的是(  )

A.泡菜(pH3.2~3.6)

B.牛奶(pH6.3~6.6)

C.鸡蛋清(pH7.6~8)

D.苹果(pH2.9~3.3)

考点:溶液的酸碱性与pH值
题型:选择题

下列关于船舶上行说法哪个正确().

A、船舶上行由于操作不当造成船首尾线与流向呈较大交角之势,如果借此势态过河就叫借势过河

B、上行船沿岸或沿浮标联机的并行线航行时,略使船首斜面向河心的操纵方法即为扬头

C、AB都对

D、AB都不对

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诊断慢性呼吸衰竭最重要的依据是()。

A.有呼吸困难、发绀等症状

B.意识障碍伴球结膜水肿

C.SaO2<90%

D.PaO2<80mmHg,PaCO2>50mmHg

E.PaO2<60mmHg,或伴有PaCO2>50mmHg

题型:选择题

一些内分泌干扰物在我国很多地区的地表水和饮水中都能被检测到,其中较为突出的是

A.金属镉

B.有机锡

C.苯并(芘

D.邻苯二甲酸酯

E.2,4-二氯苯酚

题型:选择题

English is spoken as a first language by most people in the USA, Britain, Australia, New Zealand, Ireland and Canada. However, English is spoken all over the world. It is the main language in over 60 countries, such as India, Singapore and in many of the Caribbean and Pacific islands. In those places English is often a second language.

English is also as an important international language in many other countries, like China and Japan. People in these countries use it for business, and travelers to these countries use English when they get there. Other people may learn English because they enjoy reading books in English, listening to British or American music or watching American films.

English has changed a lot these years and still goes on changing. It is no longer right to talk about British English or American English if the speaker doesn’t come from those countries. People in Japan or Korea, for example, may use the American spelling but may not sound like Americans.

English will be the most widely used language in the world in the 21st century. This language no longer belongs to British, American or Australian speakers. It belongs to anyone who can use this language. After you leave school, you will almost certainly need it.

小题1:In how many countries is English spoken as a first language in the world?

A.Five.

B.Four.

C.Three.

D.Six.小题2:In which other countries is English spoken as a main language?

A.Britain, USA and Australia.

B.India, Singapore and many of Caribbean and Pacific islands.

C.China and Japan.

D.New Zealand, Ireland and Canada.小题3:People from other countries learn English for         .

A.passing exams

B.business and traveling

C.reading English books, enjoying English music or watching films

D.Both B and C小题4:If people in Japan or Korea use the American spelling, they         .

A.will speak the same as Americans

B.may not sound like Americans

C.will speak British English

D.will speak English much better小题5:Which topic is the best for the passage?

A.A first language in the world.

B.A second language in the world.

C.English around the world.

D.A useful language.

题型:选择题

油纸电容式套管末屏上引出的小套管是供套管介损试验和变压器局部放电试验用的。正常运行中小套管应可靠地接地。

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