如图为甲、乙、丙三种物质的溶解度曲线,根据图回答: (1)t1℃时,甲、乙、丙

题型:填空题

问题:

如图为甲、乙、丙三种物质的溶解度曲线,根据图回答:

(1)t1℃时,甲、乙、丙三种物质的溶解度由大到小的顺序是           

(2)t2℃时,将30g乙物质放入50g水中,充分搅拌,所得溶液的质量是       g

(3)当甲物质中混有少量乙物质时,提纯甲的方法是         

(4)若要将a点的甲溶液转化为b点的甲溶液,采用的方法有                   

(5)若将t2℃三种物质的饱和溶液分别降温到t1℃时,则三种溶液中溶质的质量分数由大到小的顺序是           

(6)t2℃时,将含有100克水的甲和乙的饱和溶液,分别加入m克甲和m克乙,升温至t3℃,甲完全溶解,乙仍有剩余,则m的质量范围是            

考点:固体溶解度气体溶解度
题型:填空题

I’m so glad I didn’t agree        it, otherwise it would have got me into serious trouble.

A.having done

B.to do

C.doing

D.to have done

题型:填空题

某公司年产乙醇2000吨,需要玉米20000吨做原料,玉米每吨1600元,每次订货的订货成本为4000元,每吨原料的年储存成本PH为10元。若前置时间为36天,一年360个工作日。

玉米的最低年总成本是多少万元?

题型:填空题

例如孤立地评价一颗纽扣是不完整,因为同一颗纽扣,用在这件衣服上是美的但换在另一件衣服上就可能不美,这主要体现了服装的()。

A、统一性

B、变化性

C、不确定性

D、流行性

题型:填空题

阅读理解

     Some people believe that international sport creates goodwill between the nations and that if countries

play games together they will learn to live together.Others say that the opposite is true that international

contests encourage false national pride and lead to misunderstanding and hatred.There is probably some

truth in both arguments,   but in recent years the Olympic Games have done little to support the view that

sports encourage international brotherhood.Not only was there the tragic incident involving the murder of

athletes,   but the Games were also destroyed by incidents caused mainly by minor national competition.

     One country received its secondplace medals with visible anger after the hockey final.There had been

noisy scenes at the end of the hockey match,   as the losers objected to the final decisions.They were

convinced that one of their goals should not have been disallowed and that their opponents' victory was

unfair.Their manager was quite angry when he said: "This wasn't hockey.Hockey_and_the_International_

Hockey_Federation_are_finished." The president of the Federation said later that such behavior could

result in the disorder of the team for at least three years.

     The American basketball team announced that they would not give up first place to Russia,   after a

disputable end to their contest.The game had ended in disturbance.It was thought at first that the United

States had won,   by a single point,   but it was announced that there were three seconds still to play.A

Russian player then threw the ball from one end of the court to the other,   and another player popped it

into the basket.It was the first time the U. S.A. had ever lost an Olympic basketball match.Experts discussed the matter for four and a half hours before announcing that the result would stand.The American players then voted not to receive the silver medals.

     Incidents of this kind will continue as long as sport is played competitively rather than for the love of

the game.The suggestion that athletes should compete as individuals,   or in nonnational terms,   might be

too much to hope for.But in the present organization of the Olympics there is far too much that encourages aggressive patriotism.

1. According to the author,   recent Olympic Games have ________.

A. created goodwill between the nations

B. caused only false national pride

C. hardly showed any international friendship

D. led to more and more misunderstanding and hatred

2. What did the manager mean by saying,   "…Hockey and the International Hockey Federation are

    finished."?

A. His team would no longer take part in international games.

B. Hockey and the Federation are ruined by the unfair decisions.

C. There should be no more hockey matches organized by the Federation.

D. The Federation should not exist.

3. The basketball example implied that ________.

A. too much patriotism was shown in the incident

B. the announcement to make the match long was wrong

C. the appeal jury was too hesitant in making the decision

D. the American team was right in receiving the silver medals

4. What conclusion can be drawn from the passage?

A. The organization of the Olympic Games must be improved.

B. Athletes should compete as individuals in the Olympic Games.

C. Sport should be played competitively rather than for the love of the game.

D. International contests are liable for misunderstanding between nations.

题型:填空题

超声检查,可见无回声暗区包绕睾丸大部及附睾头()

A.精原细胞瘤

B.畸胎瘤

C.胚胎瘤

D.睾丸囊肿

E.鞘膜积液

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