题目

请从A~E选项中选出与各个情景相符合的选项。A.3:30 B.7:30 C.9:00 D.11:00 E.12:30⑴Hi! I'm Alex Green. I'm thirteen and I go to Park School in Oxford, the UK Today is my School Day. I get up at half past seven in the morning and then have breakfast.⑵My school is next to my house. I go to school at half past eight and lessons start at nine o'clock. We have three lessons in the morning. My favorite subject is art.⑶At eleven o'clock, we have a break and I talk to my friends. They go to the playground and play soccer, but I don't like soccer.⑷We have lunch in the dining hall 2．水是人类最宝贵的资源．用你学过的化学知识回答下列问题：（1）欲除去水中不溶性杂质，需进行的操作是过滤，该操作过程中玻璃棒所起的作用是引流．（2）某同学在完成电解水实验时，发现正极产生了10mL气体，则负极产生的气体体积是20mL．该实验能够说明水是由氢元素和氧元素组成的理论依据是质量守恒定律．