钻石亭角(),会使钻石呈现“鱼眼效应”。A.<42˚ B.<39˚ C.>39˚ D

题型:单项选择题

问题:

钻石亭角(),会使钻石呈现“鱼眼效应”。

A.<42˚

B.<39˚

C.>39˚

D.>42

考点:钻石检验员考试钻石检验员考试题库
题型:单项选择题

慢性阻塞性肺病的主要临床表现是咳嗽、咳痰、呼吸困难,需要应用的下列“支气管平滑肌松弛剂”品种有()

A.镇咳药

B.β受体激动剂

C.胆碱能受体阻断剂

D.磷酸二酯酶抑制剂

E.祛痰药和黏痰调节剂

题型:单项选择题

为了探究某些生态因素在生态系统中的作用,某同学设计了如下实验:

①取四个大小、形状相同的生态瓶,编号A、B、C、D,分别加入等量的清水,同时向C、D瓶中加入等量的同种河泥;

②在B、C、D瓶中放入等量长势相同的金鱼藻;

③在四个生态瓶中放入大小、形态和生长状况相近的金鱼各2条,然后密封;

④A、B、C瓶置于相同条件的光下,D瓶放在相同条件的黑暗环境里,实验装置如下图所示:

实验结果如下表

据上述实验回答:

(1)比较四装置可知,它们具有相同的非生物因素是________________________。比较A、B、C可知,与小鱼的存活时间有关的实验条件是________________。

(2)由A和B的实验结果可知,金鱼藻的作用是________________________。

(3)通过________两个生态瓶实验结果的比较,可以说明金鱼藻的光合作用需要光。

(4)D装置中金鱼存活时间最短的原因是________________________________。生态瓶C中的小鱼虽然存活时间最长,但最后还是死亡了,最有可能的原因是由于生态系统中生物种类________,不能达到一种真正的平衡,________能力比较差的缘故。因此,我们要保护生物的________,保护我们赖以生存的地球。

题型:单项选择题

阅读理解。

     Maurice Sendak's children's book, Where the Wild Things Are, published in 1963, has become

very successful throughout the years and was made into a movie earlier this year.

     The book's main character is a boy named Max who gets into trouble with his mother and is sent

to bed without any supper. Before long, Max's room magically becomes a forest, and he sails away to

a land where monsters live. Max isn't scared, though, and becomes king of the wild things, but after a

while, he begins feeling homesick. Max sails back home and his supper is still hot when he arrives in

his bedroom.

     Many teachers and professors like this story and use it to help children develop creativity and

imagination. Melina Davis, an education professor, said she likes how the book contains a couple

of pages that have only pictures on them. "This allows children to shape the story themselves," she

said.

     The book contains a few of larger words that some parents worry may confuse children, but

experts say those words help improve children's reading skills and challenge them.

     Davis said the book is well written which helps kids get involved in the story. "The book talks

about what all children go through, like 'I was naughty but my mommy still loves me'," Davis said.

     The book also encourages children to face their fears. "I think it's really good to show that Max

makes friends with the monsters," Davis said. "Kids can find out monsters aren't always the thing

under the bed that's going to scare them. I think this is good because it shows that the children can

go to scary places but still have a positive experience."

     Since the book has been successful throughout the years, a movie was recently made and many

people are excited to see it. Davis said she thinks the movie will be wonderful but it might be a little

scary for younger children. "You don't want bad dreams over a book that's extremely wonderful,"

Davis said.

1. Teachers and professors like the book because it helps children ____________.

A. learn to draw their own pictures            

B. understand their own fear

C. develop more quickly                    

D. become more imaginative

2. What is the intention of using the larger words in the book?

A. To add to the difficulty while children are reading.    

B. To help challenge the children's reading skills.

C. To cause the children some confusion.              

D. To help children get involved in the story.

3. Which of the following is TRUE about the book?

A. The character Max is brave enough in the story.        

B. Max was sent to the forest as punishment.

C. It is suitable for people of all ages.            

D. It is the most popular children's book ever published.

4. What does Davis think of the movie?

A. She thinks children of all ages will love it.  

B. She encourages children to see it to fight against their fear.

C. She worries that it might be too frightening for some children.

D. She believes it will be a better choice for children than the book.

5.What's the author's purpose in writing the passage?

A. To suggest ways to improve children's reading.        

B. To comment on a famous children's book.

C. To encourage children to read scary stories.        

D. To introduce a movie based on a children's book.

题型:单项选择题

甲乙二国均为世贸组织成员国,乙国称甲国实施的保障措施违反非歧视原则,并将争端提交世贸组织争端解决机构。对此,下列哪一选项是正确的?()

A.对于乙国没有提出的主张,专家组仍可因其相关性而作出裁定

B.甲乙二国在解决争端时必须经过磋商、仲裁和调解程序

C.争端解决机构在通过争端解决报告上采用的是“反向一致”原则

D.如甲国拒绝履行上诉机构的裁决,乙国可向争端解决机构上诉

题型:单项选择题

材料一:西方史学界在20世纪70—80年代掀起了打破“西欧中心论”的世界历史编纂潮流,使世界历史的编纂学在总体上进入了全球文明史。“全球史观”的基本特征是:将人类社会的历史作为一个整体来看待……“各个相互影响的活动范围在这个发展进程中愈来愈扩大,各民族的原始闭关自守状态则由于日益完善的生产方式、交往以及因此自发地发展起来的各民族之间的分工而消灭得愈来愈彻底,历史也就在愈来愈大的程度上成为全世界的历史。”

材料二:20世纪80年以来,我国有些学者提出“现代化史观”。主张“从宏观历史学的角度,把现代化作为一个全球性大转变的过程,从传统农业社会向现代化工业社会转变的大过程,进行整体性研究,涉及到政治、经济、思想文化等方面。”

按照材料一的研究角度来看世界近代史,可能会对l8世纪——l9世纪末20世纪初的哪些重大事件评价较高?

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