题目

为测定氯化钠和氯化镁混合物的组成情况，张南同学进行了如下实验。请回答下列问题： （1） 实验中发生反应的化学方程式为； （2） 求解混合物中氯化镁的质量（x）的比例式为； （3） 混合物中钠元素和镁元素质量的最简整数比为； （4） 所得不饱和溶液中溶质的质量分数为；配制实验中的氢氧化钠溶液需要的实验用品有烧杯、玻璃棒、氢氧化钠固体、药匙、托盘天平、量筒，其中还缺少的实验用品有（填名称）。Tom is the son of a farm owner. One New Year’s Day, when he was 15, his father asked him 36  on the farm for one year when he was free. Tom was 37  with his father’s idea.“That isn’t my job. I have  38 school work to do.” Hearing this, his father said, “I promise to give you the best present if you  39  finish one year’s work.” Tom thought for a while and 40  .Starting one Saturday, the boy got up early and worked hard until evening, just like  41 farmer. Time passed quickly. Tom’s crops(庄稼) grew well. 42  the last day of the year, the father called his son to him. “I’m happy to see that you have worked very hard the whole year,” said the father. “Now, tell me  43  you want.”The boy smiled and showed his father a big piece of bread   44  his wheat. I’ve already got the best present: No pain, no gain. I think this is what you wanted me to know.” His father was  45  to hear that. 【小题1】A．worksB．workC．to workD．working【小题2】A．happyB．excitedC．excitingD．unhappy【小题3】A．much tooB．too muchC．a lotD．many【小题4】A．canB．needC．mustD．should【小题5】A．saidB．answeredC．agreedD．asked【小题6】A．otherB．the othersC．any elseD．any other【小题7】A．OnB．AtC．InD．From【小题8】A．whereB．whatC．whichD．why【小题9】A．made byB．made ofC．made inD．made from【小题10】A．pleasedB．unpleasedC．unsatisfiedD．sad