下列运算正确的是（　　）

听短文，在短文中填写所缺单词
    Tom is a____boy. He is eleven years old. He's two years younger than his____, Jim. Tom is 150cm and Jim is 160cm. Jim is 50 kilos and Tom is 60 kilos. Tom wants to lose some weight, so he tries not to eat too much____. He also____more exercise than____.
    ____morning he gets up earlier than Jim and he goes____for____minutes. He usually does it after school. After dinner, Tom often goes for a ____, and Jim likes____at home. Now Tom is much____than Jim. Jim thinks he____more exercise now. He and Tom will do exercise tighter.

中国在世行的投票权上升，成为仅次于美日的世行第三大股东国。对此下列说法不正确的是（    ）

如图中心法则揭示了生物遗传信息由DNA向蛋白质传递与表达的过程．图中a〜d表示相关过程．下列叙述正确的是（　　）

Don't          today's work for tomorrow. Today's work must be done today.