问题 问答题

在玉米中,控制某种除草剂抗性(简称抗性,T)与除草剂敏感(简称非抗,t)非糯性(G)与糯性(g)的基因分别位于两对同源染色体上。有人以纯合的非抗非糯性玉米(甲)为材料,经过EMS诱变处理获得抗性非糯性个体(乙);甲的花粉经EMS诱变处理并培养等,获得可育的非抗糯性个体(丙)。 请回答:

获得丙的过程中,运用了诱变育种和__________育种技术。

答案

参考答案:单倍体

阅读理解
HE cleans your house. He repairs your broken toys. He helps you with your homework. Even if(即使) you make a lot of trouble at school, he’ll never stop loving you.
WHO?         .It’s your father, and you could never thank him enough for everything he has done for you.   
So don’t forget to do something nice for him on Father’s Day. It’s always on the third Sunday in June. This year it’s the seventeenth of June. How can we celebrate it and make it a special Father’s Day? Here are Millie’s and Ricky’s ideas:
Millie: It’s not a matter of money.
In fact I think it’s quite simple.
* Clean his shoes
* Write him a special letter.
* Make him a beautiful card
Ricky: Hey, I’ve got some American CDs Growing Pains(美剧名). Why not invite Dad to watch it together? Maybe we can understand each other better.
小题1:Which day is Father’s Day this year?
A.7th JuneB.17th JuneC.7th JulyD.17th July
小题2:Which of the following statement is true?
A.Father’s Day is always on the same day of each year.
B.Father’s day is on different day in different year.
C.Father’s Day is not celebrated in The United States
D.Father’s Day is widely celebrated in China.
小题3:下面哪个句子适合放在文中第一下划线空白处?
A.Sometimes he is lazy.
B.Why not buy him a present?
C.He would do anything for you.
D.Father’s Day began a long time ago.
小题4:What will Millie probably NOT do on Father’s Day this year?
A.Buy her dad some expensive American CDs.
B.Make her dad a beautiful card.
C.Write her dad a special letter.
D.Clean her dad’s shoes.
小题5:According to the passage, the Chinese meaning of the second underlined sentence is
A.你从来就不感谢父亲对你所做的一切。
B.你对你父亲所做的一切都不用感谢
C.你对你父亲所做的一切感谢都多余
D.你对你父亲所做的一切都感谢不尽。
单项选择题