问题 选择题

下列关于染色体组的概念,错误的是[     ]

A.二倍体生物配子中的全部染色体

B.一个染色体组中无形态大小结构相同的染色体

C.不同生物的染色体组内染色体的数目、形态、大小不同

D.卵细胞或精子中的所有染色体

答案

答案:D

写作题

假设你是李华,你的英语老师Mr. Black要求你们周六下午去听一场关于英国历史的讲座,但你因故不能参加。请你根据以下提示,写一封邮件向Mr. Black请假。

内容主要包括:

1.表示歉意;

2.去机场接一位家乡的老朋友;

3.对英国历史很感兴趣,为不能去听而感到遗憾;

4.询问是否有录音,以便补听讲座。

注意:

1.词数100左右;

2.可以适当增加细节,以使行文连贯;

3.邮件开头和结尾已给出,不计人总词数。

Dear Mr. Black.

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

                                                                              

Yours sincerely,

Li Hua

判断题