第11题: [单项选择]关于测交意义的说法,正确的是() A. 通过测交可以获得优良性状的新品种 B. 通过测交可以测定被测个体的遗传因子组合 C. 通过测交得到的后代都能稳定遗传 D. 通过测交得到的后代的性状表现相同 参考答案:B
第12题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard.[A] The early history of bookbinding. [C] Economical ways to protect old books. [B] How old books become valuable. [D] Why some books decay. 参考答案:D 答案解析:[听力原文]19-22 W: Excuse me, I’ve been using this old book for a research project and 1 notice that
A. work at B. work on C. work out D. work in 参考答案:C 答案解析:[分析] 本题的测试点是动词work搭配用法辨析。 work out做出来,计算出结果来。例如:This sum will not work out.这一总数算不出来。work at致力于。work