用下图装置可以探究二氧化碳的制取和性质。下列关于该实验的叙述正确的是（   ）

2017年国务院《政府工作报告》提出，在区间调控基础上加强定向调控、相机调控（强调政府要根据市场情况和各项调节措施的特点，灵活机动地决定和选择当前究竟应采取哪一种或哪几种政策措施），提高预见性、精准性和有效性。“相机调控”体现的哲学道理是（    ）

①矛盾着的事物及其每一个侧面各有其特点

②具体问题具体分析是正确解决矛盾的关键

③矛盾的普遍性寓于矛盾的特殊性之中

④主要矛盾对事物的发展起着决定性作用

    Do you want to be healthy and thin? All of us will say: of course! But how to be healthy and thin? If you want to lose weight and keep healthy, the first way is to be on a diet. Eating too much is bad for your health and you will easily turn fat! The best way is to eat a little sugar, but more vegetables! The other way is to do more exercise! Sport is good for your health. You should keep running or walking for about twenty minutes every day. This is the most straightforward method. If you keep doing this for a long time, you will be more healthy.

(词汇提示：1) lose weight 减肥  2） be on a diet 按规定进食；节食  3）a little 少量的 
4）method方法  5）the most straightforward method最直接的方法)

名句默写