太行山脉东西两侧的地形区是（　　）

如图，在边长为1的小正方形组成的网格中，△ABC的三个顶点均在格点上，则tan∠ABC的值为（　　）

人们常说，“狗不嫌家贫，子不嫌母丑”。其主要意思是说（   ）

    "Early to bed, early to rise makes people healthy, wealthy(富有的)and wise(聪明的). "

    This is an old English saying. Children should have ten hours' sleep every night, or they can't do their work very well. They will not be wise, either. The body needs exercise. Walkin9, running, swim-ruing and playing ball games are all exercise. Exercise keeps the body strong and makes the mind bright.