摘要:31.下图表示人体内某些物质的转化过程.请回答下列问题: ①蛋白质分子经a过程形成氨基酸时.所消耗的水中的氢参与形成氨基酸 的 . ②b过程进行时必须首先发生的物质变化过程是 作用.当人体血糖浓度降低时.胰岛中的某种细胞产生的 可以促进b过程的进行. ③上图中 过程形成的氨基酸一定是非必需氨基酸. ④d过程进行的场所在细胞内的 上.此时氨基酸的排列顺序直接由 来决定. 棉花的纤维有白色的.也有紫色的,植株有抗虫的.也有不抗虫的.为鉴别有关性状的显隐性关系.有人做了以下两组杂交试验.结果如下表.(假定控制两对性状的基因独立遗传,颜色和抗虫与否的基因可分别用A.a和B.b表示).请分析回答: 组合序号 杂交组合 子代的表现型和植株数目 紫色不抗虫 紫色抗虫 白色不抗虫 白色抗虫 1 白色不抗虫(甲)×紫色不抗虫 753 251 762 248 2 白色不抗虫(乙)×紫色抗虫 0 0 1508 1529 ①上述两对性状中. 是显性性状. ②杂交组合1的子代中出现白色抗虫和紫色抗虫植株的原因是 . ③杂交组合1的子代中白色不抗虫植株的基因型是 . ④若要利用亲本中的棉花品种获得可稳定遗传的白色抗虫棉.最简单的方法是: . ⑤已知题中所给杂交组合1.2的亲本中A的基因频率为40%.若它们的子一代中所有个体全部存活无一被淘汰.则该子一代群体中a的基因频率是 .

网址:http://m.1010jiajiao.com/timu3_id_2496008[举报]

语境填词, 注意动词形式。(每空1分,满分20分)

1.We must make _______(安排,筹备)for the wedding.

2.The new law f_________ smoking in offices.

3.This type of university course is no longer_________(有关的) to today’s problem.

4.He failed to _________(获得) a scholarship.

5.As soon as he saw the letter, he ______ (承认) that he had written it.

6.I am sorry to ___(打扰)you, but can you tell me the way to the nearest supermarket?

7.We still _______(欠) the garage $50 for those repairs.

8.He found it hard to __________(适应) to working at night.

9.It is _______(显然的) from her accent that she is from the north of China.

10.There were more than 50 a_________ for the job, but only 10 were employed.                    

11.The ___________(大多数) of representatives are in favor of the plan, only a few are against it.

12.He was _____(雇佣) three years ago and he is content with the job in the company.

13.Research ____________(暗示) that eating habits are related to health.

14. His telephone is out of service. Is there any other ______(方式)of contacting him?

15.I take _________(安慰) from the fact that his friends are there to help him.

16.The country is a___________ in natural resources.

17.She u____________ the responsibility for the changes.

18.The teacher _____________(建议) the students to read the following books.

19.The railway lines run p___________ to the road, so they will never meet.

20.Clothes and blankets have been ________(分配,分发) among the flood victims.

 

查看习题详情和答案>>

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网