（10分）
(1)根据下列几种粒子的结构示意图，回答问题：
①其中属于阴离子的是 ，属于金属元素的是 。(填编号)
②试写出A、C、D三种元素形成的一种化合物在水溶液中的电离方程式： 。
（2）已知氢元素有
、
、
三种核素，氧
元素也有
、
、
三种核素，则它们所形成的水分子共有 种。
（3）实验室可以用高锰酸钾和浓盐酸反应制取氯气，反应的化学方程式如下：
①在该反应中，氧化剂是 ，还原剂是 。
②当有0.20 mol电子发生转移时，生成氯气的体积为 L(标准状况)
（10分）(1)回答问题：
① B ， D ，(填编号) (每空１分)
②电离方程式： Na2SO4=2Na++SO42-_ 或Na2SO3_=2Na++SO32- (2分)
（2）18 种。(2分)
（3）① KMnO4 ， HCl 。(每空１分)
② 2.24 L(标准状况) (2分)
One afternoon in January in 1998, Susan Sharp, 43, and her 8-year-old son David, were walking across an icy square, when Susan's cane(手杖) slipped on the ice. Her face first into the mud. David her mother's side, “Are you all right, Mom？” , Susan pulled herself up, “I'm okay, Honey,” she said. Susan was falling more since she had trouble walking. Every inch of ice was a 40 danger for her. “I wish I could do something,” the boy thought. David, too, was having of his own. The boy had a speech problem, so at school he talked . One day, David's teacher announced a homework. "Each of you is going to come up with an ," she said. This was for "INVENT AMERICA", a national competition to encourage creativity in children. An idea David one evening. If only his mother's cane didn't slip on the ice. “What if I your cane to a nail coming out of the bottom” he asked his mother. “ the sharp end would scratch(划破) floors,” Susan said. “No, Mom, I make it like a ball-point pen. You take your hand off the button and the returns back up.” Hours later the cane was finished. David and his father as Susan used it to walk 50 feet above the . Happily Susan cried out, “It !” In July 1999, David was national winner for the "INVENT AMERICA". David began to make public appearance. Thus he was forced to communicate .Today, David is nearly free of his speech problem, and his is becoming well accepted.
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