下列经呼吸道传播的疾病有（） A.风疹 B.流行性感冒 C.登革热 D.麻疹 E.腮

联合国在调查200个国家中，发现缺水的国家有100个，严重缺水的国家有40个，严重缺水的国家占调查国家的40%．______．

（8分）如图所示，甲、乙、丙是三种常见单质，X、Y、Z是常见化合物，它们之间有如下转化关系：

⑴若甲是短周期金属单质，乙、丙是短周期非金属单质，X、Y、Z中只有一种是离子晶体，

试推断：

①X的电子式是______________________________。

②X与甲反应的化学方程式____________________________________。

⑵若甲是气体单质，丙通常是液体，Y和Z具有相同的阳离子，X与Z含有相同的阴离子，试推断：

①写出Z的化学式_______________________。

②写出X与足量的甲在溶液中完全反应的离子方程式：________________________                      _ 。

Her failure in the college entrance exam ___________ her the opportunity to go to university.

A．spent

B．took

C．cost

D．paid

A good translator is by definition bilingual. The opposite is not (1) true, however. A born and bred bilingual will still need two (2) to become a translator: first, the skills and experience necessary for (3) ; second, knowledge of the field in which he or she will (4) . The skills and experience for translation include the ability to write (5) in the target language, the ability to read and understand the (6) language material thoroughly, and the ability to work with the latest (7) and communication hardware and software.
Does a born and bred bilingual (8) a better translator than someone who learned language B later in (9) There is no definite answer, but the following issues are important. (10) , a born and bred bilingual often suffers from not truly knowing (11) language well enough to translate, with some even suffering from what (12) known as a lingua-ism, a state in which a person lacks (13) full, fluent command of any language. Second, born and bred bilinguals (14) don’t know the culture of the target language well enough to (15) top-quality translations, or cannot recognize what aspects of the source language (16) its culture need to be treated with particular care, as they (17) in a sense too close to the language. And last, they often (18) the analytical linguistic skills to work through a sticky text.
On (19) other hand, the acquired bilingual may not have the sam0e in-depth (20) of colloquialisms, slang, and dialect that the born bilingual has. Also, the acquired bilingual will not be able to translate as readily in both directions (from B to language A and A to language B). Finally, born bilinguals often have a greater appreciation of the subtleties and nuances of both their languages than someone who learns their B language later in life can ever hope to have.

创业过程当中出现的一些挫折是（）的现象。

A.偶然

B.必然

C.或然

D.应然