从直接具体经验到抽象经验排列了11种媒体,构成一个经验锥形的提出者是()
A.布鲁纳
B.桑代克
C.皮亚杰
D.戴尔
参考答案:D
阅读理解
My name is Li Kuan. My English teacher is Julia. She is from England. She has two children(孩子): a son and a daughter. Her daughter is Mary. Her son is Ted. Julia and her daughter are in China, but her
husband(丈夫) Paul Smith is in England. And her son is in America. Paul is a policeman(警察).Ted is a
college(大学) student. Mary and I are in the same school. We are good friends. I help her with her
Chinese and she helps me with my English. We often help each other and learn(学习) from each other.
根据短文内容,完成下列句子。
1. Julia and Paul are Mary’s _________.
2. Ted’s _________ is my good friend.
3. Ted and Mary are _________ and sister.
4. Mr. Smith is a policeman in _________.
5. Paul’s wife(妻子) is a _________ in China.
(10分)(1)有人研究证明:使用氯气作自来水消毒剂,氯气会与水中有机物反应,生成如CHCl3等物质,这些物质可能是潜在的致癌致畸物质。目前人们已研发多种饮用水的新型消毒剂。下列物质不能作自来水消毒剂的是( )(填序号)。
A.明矾
B.二氧化氯
C.臭氧
D.高铁酸钠( Na2FeO4)(2)高铁(VI)酸盐是新一代水处理剂。其制备方法有:次氯酸盐氧化法(湿法)和高温过氧化物法(干法)等。湿法是在碱性溶液中用次氯酸盐氧化铁(III)盐,写出该法的离子方程式: 。
(3)用高铁(VI)酸盐设计的高铁(VI)电池是一种新型可充电电池,电解质溶液为KOH溶液,放电时的总反应:3Zn+2K2FeO4+8H2O→3Zn(OH)2+2Fe(OH)3+4KOH
①写出正极发生的电极反应式: 。
②用高铁(VI)电池作电源,以Fe作阳极,以Cu作阴极,对足量KOH溶液进行电解,当有0.1molK2FeO4反应时,在电解池中生成H2 L(标准状况).
③下表列出了某厂排放的含锌废水中的含量及国家环保标准值的有关数据: