我们常常把法律称之为“国法”，这是因为 （）

根据上图和实验现象，回答下列问题：（用化学式表示）

    Lots of men and women go shopping on Black Friday in the USA and other western countries．Supermarket gives discounts（折扣）of up to 70%．It's a big shopping day in the USA and it____ into Britain five years ago．On that day，the police go to the supermarkets and shoppers are there．The police are worried that the supermarkets are too____With the help of the police，shoppers can get in and out of the supermarkets safely．

    Shoppers in the UK are happy on Black Friday____the clerks in the supermarkets are not．Because they are very tired on that day．On the US____of Thanksgiving，people spend it with their family．Many big stores aren't open on that day．There are over 60 letters on the website Change，org．All of ____show that they want Black Friday to change．They think family is more important than profits（利润）．

在“测量小灯泡功率”实验中，电池组是由4节二号干电池串联而成的，小灯泡的额定电压是3.8V．刚好电压表的0～15V档量程损坏了，聪明的小明同学想出了一个办法，就是将0～3V的那档量程的电压表按图的方法连接起来．闭合开关时，电压表的示数是2V．这时应将滑动变阻器的滑片P向____ 方向移动．此时电流表的示数____ （填：“变大”或“变小”）．

荀子曰：“礼之所以正国也，譬之犹衡之于轻重也，犹绳墨之于曲直也，犹规矩之于方圆也。”胡适讲道：“礼”字广义颇含法律的性质。儒家的‘礼’和后来法家的‘法’同是社会国家的一种裁制力。”这表明（    ）