A:染色体是DNA的唯一载体
B:—条染色体上只有1个DNA分子
C:基因是DNA分子的任意片段
D:基因在染色体上呈线性排列
有关大洲大洋分布的叙述,正确的是
—Yes, it's quite ______ excellent play, so I can't wait to turn on the TV when I get home.
根据短文,选择正确答案。
Hello! My name is Sun Wei. Here is an American boy. His name is David Smith. He is twelve. And I am twelve, too. David is in Class Three, Grade One. I am in Class Three, Grade One, too. He is Number Eight, Row Five. I am Number Five, Row Four.