小明同学为了测定市面销售的某品牌纯碱（杂质为氯化钠）中碳酸钠的质量分数，进行了如下实验：

①在三个烧杯中分别加入11.0g样品；

②向三个烧杯中分别加入一定质量的10.0%氯化钙溶液；

③将充分反应后生成的沉淀过滤、洗涤、干燥，并称量得到的白色固体．

实验所得数据见下表，请你分析并进行有关计算：

如图所示，拉力F=125Ｎ，在10s内将重物匀速提升2m，滑轮组的机械效率是80%。则下列说法不正确的是(   )

根据句意及首字母提示完成单词

（1）My teacher is very f____，we all like her.

（2）My father is watering flowers in the g____ now.

（3）—Where were you b____?  —In a small city in Hunan.

（4）My son is 9 years old. He studies in a p____ school.

（5）The old man lived here 20 years a____.

实验小组用如图所示装置进行实验．

    Liu Mei has a h____family. She lives w____．her grandparents and parents in Dantu. Her father is a doctor. He goes to work o____．foot every day. He is not very tall, b____．he is very strong. Her mother is a teacher. She goes to work by car. She often h____．her students at school. Liu Mei's grandparents stay at home. In the morning, they go t____．the park. In the afternoon, they d____． tea with their friends. In the e____,they watch TV .Liu Mei is a student in No.1Middle School. Her school is beautiful. There are many tall b____．there. She wants to s____everyone around her school. She likes it very much.