在下图的遗传图解中,“A”表示控制双眼皮的基因,“a”表示控制单眼皮的基因。如果

题型:实验题

问题:

在下图的遗传图解中,“A”表示控制双眼皮的基因,“a”表示控制单眼皮的基因。如果一对夫妇,父亲的基因组成是“aa”其性状为单眼皮,母亲的基因组成是“Aa” 其性状为双眼皮。请据图回答:(8分)

(1)人的单眼皮和双眼皮这一对性状,在遗传学上称为                  

(2)图中卵细胞①的基因组成为         , 精子②基因组成为         

(3)他们的子女中③的基因组成为           ,③的性状为         (填“单眼皮”或“双眼皮”)。④的基因组成为           ,④的性状为           (填“单眼皮”或“双眼皮”)。

(4)如果这对夫妇再生一个孩子,这个孩子是双眼皮的可能性是      

考点:基因经精子或卵细胞的传递基因控制生物的性状生殖过程中染色体的变化基因的显性和隐性
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The effect of the baby boom on the schools helped to make possible a shift in thinking about the role of public education in the 1920’s. In the 1920’s, but especially (1) the Depression of the 1930’s, the United States experienced a (2) birth rate. Then with the prosperity (3) on by the Second World War and the economic boom that followed it, young people married and (4) households earlier and began to (5) larger families than had their (6) during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. (7) economics was probably the most important (8) , it is not the only explanation for the baby boom. The increased value placed (9) the idea of the family also helps to (10) this rise in birth rates. The baby boomers began streaming (11) the first grade by the mid-1940’s and became a (12) by 1950. The public school system suddenly found itself (13) The wartime economy meant that few new schools were buih between 1940 and 1945. (14) , large numbers of teachers left their profession during that period for better-paying jobs elsewhere.

(15) , in the 1950’s, the baby boom hit an antiquated and inadequate school system. Consequently, the custodial rhetoric of the 1930’s no longer made (16) ; keeping youths ages sixteen and older out of the labor market by keeping them in school could no longer be a high (17) for an institution unable to find space and staff to teach younger children. With the baby boom, the focus of educators (18) turned toward the lower grades and back to basic academic skills and (19) . The system no longer had much (20) in offering nontraditional, new, and extra services to older youths.

8().

A. tenant

B. determinant

C. lubricant

D. repentant

题型:实验题

下列句子没有语病的一项是[ ]

A.大凡世界上的人物多是复杂的,好文章多是婉曲的,所以,我们的眼光也应婉曲、复杂些。

B.我同意他们的说法,因此得到一个经验——要做梦,就做大梦,只要你意志坚定,并付诸行动,美梦就会成真。

C.昨天,几个市教育局的领导到我们学校指导工作,我们的校门口拉起了“欢迎上级领导莅临我校指导工作”的条幅。

D.诗,从生活的土壤中萌发,犹如根植于沃野的珍卉,更像不留名的小草,在岩缝里,在大树旁,抽出几朵绿茵的小花,绽出几枝毫不起眼的枝叶。

题型:实验题

“不要问国家为你们做些什么,而要问你们能为国家做些什么?”这句话告诉我们

A.一个人要勇于承担社会和国家的责任

B.一个人的责任意识就是要对国家和社会负责

C.一个人只要为国家做有益的事情,而国家不要为个人做什么事情

D.关注社会也就是关注自己

题型:实验题

下列骨折愈合标准中哪项是首先检查和最重要的

A.连续观察2周、骨折处不变形

B.局部无压痛及纵向叩击痛

C.上肢向前平举1kg重物,持续1分钟

D.局部无反常活动

E.下肢不扶拐杖行走3分钟,不少于30步

题型:实验题

建立主题数据库的目的是( )。

A) 减少应用项目开发所需要的资金投入
B) 加速应用项目的开发
C) 增加应用项目开发的稳定性
D) 减少应用项目开发所需要的人员投入

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