研究人员用同种小鼠进行了某中药制剂、四环素（一种抗生素）对肝脏脂肪含量影响的实验．实验设计和结果如下表所示（中药制剂和四环素都用生理盐水溶解），请据表分析回答：

（1）若要观察小鼠皮下脂肪细胞中的脂肪颗粒，可用____ 染色．

（2）现有健康的体重相近、发育状况相同的雌雄小鼠各100只，按上表的实验设计应将这些小鼠进行分为五组，每组的情况为____ ，表中所示的实验自变量有____ ．

（3）甲组和乙组对照可说明腹腔注射四环素导致____．上表实验结果可初步说明该中药制剂能____ （填“降低”或“升高”）肝脏脂肪的累积量（增加量）．

（4）研究人员认为，要证明某中药制剂对肝脏脂肪含量的影响，还需要观察中药制剂对没有注射四环素的小鼠肝脏脂肪含量的影响．请完善实验设计并回答问题：

Ⅰ．实验步骤：

①步骤一：按上表所示的实验设计的要求增加3组小鼠，并编号．

②步骤二：这3组小鼠除每天喂养相同的饲料外，每天还需分别喂0.05g、0.10g、0.15g的中药制剂，共11天．同时在第8至11天注射____ ，保持其它条件相同且适宜．

③步骤三：测量并统计实验结果．

Ⅱ．讨论：

①将得到的实验结果与上表的____ 组的结果进行对照，然后得出结论．

②步骤二中需要“保持其它条件相同且适宜”，其原因是除需保持单一变量使各组之间有对照外，还需____

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    It is impossible to know when you might find yourself lost in a forest. If you know what to do, you can survive in a forest without much trouble; but if you are not prepared, survival can be much less likely.

Keep fear at bay

    It is completely natural to be afraid when you are faced with a survival situation. ____ The more your fear overcomes you, the lower your chances are of survival, as your mind is going to become clouded and panic may set in.

Stay warm

    Obviously, the low body temperature is one of the primary dangers you face when you must survive in the forest____ Never stop to sleep or quit moving around unless you have appropriate shelter.

Know how to make a fire

    Obviously , if you have a lighter or matches, this is not a problem. But if not, you can attempt to use a dry narrow pointed stick and a dry flat piece of wood. ____ This requires a great deal of work, but if done correctly, you will succeed.

Make some shelter

    ____ The easiest way to provide protection is to find a fallen tree and cover it with other branches and brush so that you can stay in the natural pit underneath the tree trunk.This is a very important aspect of being able to survive in the forest.

Stay put unless you know exactly where you are

    If you can build a stable shelter and start a fire, you can survive in the forest for several days. ____ If you know where you are, travel as far as possible during the day while making sure you stop long enough before dark so that you can build another shelter.

据《左传》记载，晋国上卿赵简子规定：“克敌者，上大夫受县，下大夫受郡。”此项举措冲击的制度有

A.溶质质量      B.温度          C.溶质颗料大小    D.____