【简答题】句型转换。 1. I like riding bikes.(改为同义句) _____ _____ is riding bikes. 2. The stamp on the desk is Ben's.(对画线部分提问) _____ _____ is Ben's? 3. This is a flower stamp.(改为复数句子) _____ are _____ stamps. 4. They d...
【单选题】A man has genotype A1A2 G1G2. (one each of the A1 and A2 alleles of gene A, one each of the G1 and G2 alleles of gene G ) The A and G loci are on difference chromosomes. What gametes will many meioses...
【简答题】阅读短文,选择正确答案。 Many Americans have been leaving their cars at home and riding to work on bicycles. Andy Clark is the leader of the League of American Bicyclists. His group supports bicycling for fun, fi...