题目

小鼠是生物、医药等科研人员经常选择的实验材料，根据下面模式图回答下列问题： （1）若实验小鼠为雌性，上图中甲细胞正在进行           分裂，甲细胞的名称是         。 （2）若该雌鼠的基因组合为AaBbDD，图甲中1表示性染色体，则2、3、4表示         。与本次分裂同时产生的配子的基因型是         。 （3）若乙细胞产生的物质能与抗原特异性结合，则该细胞为               。 （4）若丙细胞能无限增殖，且形单词拼写，每空一词。I was very ____1.__ (羞怯的) when I was a little girl. I was afraid to talk in English and I didn’t do well in reading, ____2.____(发音)and remembering English words. Then I asked my English teacher for help and my teacher gave me some advice about how to practice English and learn English ____3.___(词汇). Then I tried to listen to some English programmes on the __4.___ (广播)and practiced pronouncing English words aloud every day. And I bought an English-Chinese dictionary to look up some 5.___(基础的) words.