题干
—Tommy looks so tall．
—That's right．Tommy is known as the tallest boy in our school．
A：wants to be
B：is famous as
C：used to be
答案(点此获取答案解析）
B
—Tommy looks so tall．
—That's right．Tommy is known as the tallest boy in our school．
A：wants to be
B：is famous as
C：used to be
，则该DNA分子连续复制两次共需游离的胸腺嘧啶脱氧核苷酸（ ）