对下列物理量的估测中你认为最接近实际的是（　　）

公元1519﹣1522年间，首次实现人类环球航行，从而证实地球形状的航海家是（    ）

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I have a good friend. ①他叫汤姆。He is a nice boy, but he eats too much and he doesn’t like sports.

He has a big breakfast every morning. He has four eggs, some bread and milk. For lunch, he eats two hamburgers, ② lots of French fries and chicken. He has much cola, too. For dinner, he likes beef(牛肉) and salad. He likes ice cream, cola, hamburgers and dessert.

③ Too much food is not good for him. And he is not healthy.

在有理数范围内，下列各多项式能用公式法进行因式分解的是（      ）。