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问题 选择题

将下列物质放在盛有水的烧杯中，用玻璃棒搅拌，不能形成溶液的是（　　）

A．蔗糖

B．食盐

C．纯碱

D．冰块

答案

A、蔗糖易溶于水，能和水形成均一、稳定的混合物，即能够和水形成溶液．故选项错误；

B、食盐易溶于水，能和水形成均一、稳定的混合物，即能够和水形成溶液．故选项错误；

C、纯碱易溶于水，能和水形成均一、稳定的混合物，即能够和水形成溶液．故选项错误；

D、冰块和水是同种物质，混合时不能形成溶液．故选项正确．

故选D．

单项选择题

An Indian anthropologist, Chandra Thapar, made a study of foreign cultures, which had customs similar to (91) of his native land. One culture in (92) fascinated him because it reveres one animal (93) sacred, much as the people in India (94) the cow. The things he discovered might interest you (95) you will be studying India as part of this course.
The tribe Dr. Thapar (96) is called the Asu and is found on the American continent north of the Tamhumara of Mexico. Though it seems to be a (97) developed society of its type, it has an overwhelming (98) with the care and feeding of the rac—an animal much like a bull in size, strength and temperament. In the Asu tribe, it is almost a social (99) to own at least one (100) not more rats. People not possessing at least one are (101) in low esteem by the community because they are too poor to (102) one of these beasts properly. Some members of the tribe, to (103) their wealth and social prestige, even own (104) of racs.
(105) the rac breed is not very healthy and usually does not live more than five to seven years. Each family invests large (106) of money each year to keep its rac healthy and shod, for it has a tendency to throw its shoes often. There are rac (107) in each community, perhaps more than one if the community is particularly (108) . These specialists, however, due to the long period of ritual training they must undergo and (109) the difficulty of obtaining the right selection of charms to treat the rac, demand (110) offerings whenever a family must treat an ailing rac.

A．searched

B．lived

C．learned

D．studied
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多项选择题

华为UCEMS对IAD的管理有哪些（）.

A、参数管理

B、协议管理

C、端口管理

D、升级管理
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