题目

如图是部分短周期主族元素原子半径与原子序数的关系图。下列说法错误的是( ) A．电解熔融的X与Z组成的化合物可以得到单质Z B．Z的单质在空气中加热，生成一种耐高温物质 C．Y、Z、R三种元素的最高价氧化物对应的水化物相互之间可以发生反应 D．X、Y两种单质在加热条件下反应生成的产物为碱性氧化物 此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正： 此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。 此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。 此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。 注意：原行没有错的不要改。 My brother Tom was very selfish when he was a little boy. He did not want share things with other people. For             1._____ example, when he bought a chocolate cake, he put them       2._____ in a secret place where I couldn’t find. Then he               3._____ ate it all, by himself. He never helped other.                  4._____ He said he is busy. That is, a game of                      5._____ tennis making him very busy. He did not care                6._____ if something he did made people angry. For                  7._____ instance, on one night he played strong and                8._____ loudly music till four o’clock in the morning. But             9._____ he is difference now. He often helps grandma with          10._____ housework, helps mom with cooking and helps            his classmates with their lessons.