2016年7月1日，庆祝***成立_______周年大会在北京人民大会堂隆重举行。******在会上发表重要讲话强调，面向未来，面向挑战，全党同志一定要不忘初心、继续前行。（    ）

The sports centre

    The sports centre (中心) is open from next week and it' s only $20 a year.

    There are some soccer teams — one for girls and two for boys.

    There is also a basketball team for boys.

    There are six tennis courts (球场). They are free on weekdays, but it is $2 an hour on the weekend. Every year there are three tennis games. The first is next week.

    On weekdays the swimming pool (游泳池) is open from 7:00 to 18:00, but it is closed(关闭) at lunchtime (12:00~14~00). On the weekend, it is open all day. It is closed in the summer holidays.

老年人易患骨质疏松症主要是由于缺铁而引起的．（判断对错）

三国时期，我国已经有了关于火星的明确记载；17﹣19世纪，欧洲人用望远镜观测到火星的表面有许多河床；近年来，人类用卫星近距离拍摄到火星的表面有许多类似月球表面的坑洞，并观测到火星表面的气温、气压等现象。从认识论的角度看，这体现了（    ）

①人类认识是无限发展的②人类追求真理的过程并不是一帆风顺的②实践的发展不断提供新的认识工具和手段④认识是一种圆圈式的循环运动