长江黄河的叙述正确的是（  ）

 在生产生活中，你会发现“化学就在身边”。
(1) 自然界中天然存在的最硬的物质是____  。
（2）上海世博园内安装的“直饮水”机，采用“活性炭+超滤层+紫外线”净水工艺。活性炭在此起____ 作用，净化后的水属于____ （选填 “混合物”或“纯净物”），在净化后的水中可加____  检验是否是硬水 。    
（3）自然界消耗二氧化碳的主要途径是植物的____ 作用；实验室中检验CO₂是否收集满的操作和现象____ 。
（4）取用10mL盐酸，要用到的仪器有 ____  、____ 。
(5) 实验室用高锰酸钾制取氧气时有如下操作：

F . 熄灭酒精灯       G .连接仪器         H . 把试管固定在铁架台上
正确的连接顺序为：____  。

材料一：商鞅把法作为树立国家权力的最重要的手段来强调，关于惩罚方面，对犯罪集体负责的原则也得到了强调。他明令禁止父亲与成年之子或成年的弟兄在一户同居。为了控制的目的而把民众分成小单位的基本思想在以后的帝国时代，甚至晚至民国时代，仍行之不辄。……商鞅的主要目的是建立一个以勤劳的农民和有纪律的军队为基础的统一而强大的国家，军队的士兵实际上征自农民。

——摘编自《剑桥中国秦汉史》

材抖二：商鞅变法，废孝弟（悌）仁义，秦先强而后促；王安石变法，专务剥民，宋因以致乱，此史而失者也。商、王之失在残酷剥民，非不可变也，法非其法也。

——张之洞《劝学篇·变法第七》

请回答：

48＋39=938

    Hello, listeners. Welcome to Henton Hospital Radio. Before our music program begins, I'm going to repeat some of our hospital rules.

    The hospital can sleep 800 patients. There are 8 beds in each ward（病房). The visiting hours are in the afternoon from 2: 30 to 3: 30 and in the evening from 7: 00 to 8: 00. But remember only two visitors at a time. Sorry about that, but you can see what would happen if we didn't have these rules.

    The other rules are about our time schedule. We start quite early-you might not be used to that. We wake you at 6 o'clock, and breakfast is at 8 o'clock, lunch at noon. There's tea at 3:30 and supper is at 6 o'clock.

    You can see the "No Smoking" sign-we don't allow smoking in the wards. I'm sure you understand why. However, if you do need to smoke, there are some smoking-rooms for you.

    You will find the radio switch(开关) on the wall near your bed, with your own headphones, if you want to listen. It's our own hospital radio wishing you a quick recovery(康复).