小明发现，高空坠物下落越来越快，而跳伞远动员利用降落伞却能安全着地。空中下落的物体，其最大速度与什么因素有关呢？为了研究这一问题，小明在老师的帮助下进行如下实验：

①取相同型号、质量为m的纸杯10个，按如图所示分成A、B、C、D四组。

②将A组纸杯在一定高度、底部向下静止释放，让其自由下落，并用仪器记录下落过程中的速度。

③分别用B、C、D组纸杯重复步骤②。

④记录并整理相关数据如下表。

    Although problems are a part of our lives, it certainly doesn't mean that we let them rule our lives forever. One day or the other, you'll have to stand up and say – problem, I don't want you in my life.

    ____ Problems with friends, parents, girlfriends, husbands, and children – the list goes on. Apart from these, the inner conflicts within ourselves work, too. These keep adding to our problems. Problems come in different shapes and colors and feelings.

    But good news is that all problems can be dealt with. Now read on to know how to solve your problems.

    Talk, it really helps. What most of us think is that our problem can be understood only by us and that no talking is going to help.____Talking helps you move on and let go.

    Write your problems.____When you write down your problems, you are setting free all the tension from your system. You can try throwing away the paper on which you wrote your problems. By doing this, imagine yourself throwing away the problems from your life.

    Don't lose faith and hope. No matter what you lose in life, don't lose faith and hope. Even if you lose all your money, family… you should still have faith.____

    Your problems aren't the worst. No matter what problem you get in life, there're another one million people whose problems are huger than yours.____ Your problems might just seem big and worse, but in reality they can be removed.

    Go about and solve your problems because every problem, however big or small, always has a way out.

A. But the truth is that when you talk about it, you're setting free the negative energies have been gathering within you.

B. When we have a problems, a pressing, critical, urgent, life-threatening problem, how do we try and solve it?

C. Tell yourself: when they can deal with them, why can't I?

D. Of course, we've been fighting troubles ever since we were born.

E. We can often overcome the problem and achieve the goal by making a direct attack.

F. Having a personal diary can also be of huge help if you don't want a real person to talk with.

G. With faith and hope, you can rebuild everything that you lose.

制度的建立和调整需与实际相结合,同时又将对国家和社会产生深远影响。阅读下列材料,回答问题:

材料一  英国革命的最大成果,也是它在现代民主政治创制实验方面的最大成就,就是创造了一种全新的政体……美国革命的首创性在于……孟德斯鸠“以权力制约权力”的学说在政府体制的设计方面得到较好的贯彻。                                                                                                  

                                                                                                                                                                                      ——马克思《世界文明史》

材料二  亚历山大二世说:与其等农民自下而上地解放自己,不如自上而下地解放农民。还说:凡能够维护地主利益的措施,都一一地做到了。

材料三  1933年3月4日罗斯福在总统就职演说中说:“……叹交换手段难逃贸易长流冰封;看工业企业尽成枯枝残叶;农场主的产品找不到市场;千万个家庭的多年积蓄毁于一旦。”但是,他鼓励美国人民:“真正让我们感到恐惧的,只是‘恐惧’本身。”

一支牙膏1元5角，小明有10张5角钱，买了两支后，小明还有____元钱。