某农场牧养的羊群中有黑、白两种毛色的羊。已知毛色受一对等位基因A,a控制。牧民让两只

题型:填空题 案例分析题

问题:

某农场牧养的羊群中有黑、白两种毛色的羊。已知毛色受一对等位基因A,a控制。牧民让两只白色羊交配,后代中既有白羊,也有黑羊。请分析回答:

两只白羊交配产生的后代中出现了白羊和黑羊,这种现象在遗传学上称为()。

考点:中学教师招聘考试生物专业知识:遗传与进化生物专业知识:遗传与进化题库
题型:填空题 案例分析题
计算下面各题:
1
8
+(
7
8
-
5
12
);
4
1
3
-2.5+1
3
4
2
3
-
1
9
-
2
9
〔16.8-(1.6+3.8)〕÷1.9;9.8×100.1;8.4÷3.5.
题型:填空题 案例分析题

汉朝长安城里叫做“市”的地方是专门的

A.居民区      

B.商业区

C.办公区

D.皇城区

题型:填空题 案例分析题

首先,请先阅读下列的应用文:

A. Gesichter of Orients

Documents of the life of the various cultures who lived in the region of present-day Jordan, from the early Neolithic (8th century B.C.) to the early Islamic period. Besides, there are documents about other religious group.

B. Covering the Real

Works by Warhol, Richter, Polke, Baldessari and another 20 artists show the relationship between art of different ages in different ways—photography, painting, video, installation and the press picture.

C. At Home with ter Borch

While Gerard ter Borch the younger is well known as a Dutch master, few people know that the other members of the family were also highly skilled in art. The exhibition shows about 80 drawings by ter Broch, his father and his half-brothers and sister.

D. Robert Couturier: 100Ans of Sculptor

Celebrate the 100th birthday of the French sculptor, the exhibition brings together more than 100 sculptures and drawings. Couturier, who developed a close relationship with Maillol, found his inspiration in the human body, and use stone, plaster and bronze to express it.

E. Follow me! Chinese Art at the Threshold of the New Millennium

Looks at the work of 19 artists born after 1960 who escaped the ideological influence of the Cultural Revolution. Everyday life and separation in the new age and in the big cities, as well as marks of the Revolution.

F. China Crossroads of Culture

Explores the development of Chinese art from the Han through the Tang dynasties, a period when waves of conquest, trade and immigration along the Silk Road set off a new Chinese creativity. The 200 items include objects in jade, gold, silver, textiles, works on paper and wall painting.

请阅读以下个人信息,然后为其选择合适的地方。

小题1:Bessy: Having been interested in painting for 3 years, she now falls in love with sculpture. She feels the form can express fully what she sees, feels, and thinks. Recently, she has joined in the local sculpture club.

小题2:Collins: He is an exchange scholar on art. Since childhood, he has been fascinated in Chinese ancient art. The land with a long history, the “great inventions”, the hard-working nation with full wisdom, has played a world leading role in human history for thousands of years. He always wonders, how they achieved this?

小题3:Mr. Chang: An overseas Chinese. He left China soon after the founding of New China. All things are proving the success of China’s opening-up policy, and he feels inspired and proud. He’d like to know more about its recent development.

小题4:Paul: He is a graduate of Leeds University. Working on a report about religion, especially Christianity, Muslim and Islam, he has made many visits to famous religious places and spent much time in libraries searching for related information and proof.

小题5:Denny: He is a college student who majors in art. As an excellent student in the department, he has done some research on the art expressing ways of different times. He’d like to find out that with the development of science and technology, what new ways can be adopted to show art?

题型:填空题 案例分析题

已知∠AOB=60°,∠BOC=20°,则∠AOC=______.

题型:填空题 案例分析题

下列拟采用的金属防腐措施,不正确的是 

A.给金属衣架或电线外面包上一层塑料层

B.给自行车钢圈镀上一层金属铬

C.在铁船身上镶嵌金属铜

D.给铁栅栏表面涂上一层油漆

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