题目

用方框中所给单词的适当形式填空,每词限用一次。strawberryinhelptidy library (1) Mike's room is very, we should learn from him. (2) You can read books (看书) in the school . (3) There are some on the table. (4) They are nice, and they alwaysothers (其他人). (5) The desk is Mike's room. 答案:【1】tidy 【1】library 【1】strawberries 【1】help 【1】in15.采用下列哪一组方法,可以依次解决①~④中的遗传学问题       (    ) ①鉴定一只白羊是否是纯种      ②在一对相对性状中区分显、隐性  ③不断提高小麦抗病品种的纯合度   ④检验杂种F1的基因型 A.杂交、自交、测交、测交              B.测交、杂交、自交、测交 C.测交、测交、杂交、自交              D.杂交、杂交、杂交、测交
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