题目

Before I had my son, I spent two years working with children with disabilities. I learned that shouting and threats of punishment would result in a disaster. Coming up against their behaviour could only make the job harder and their behaviour more extreme. I found something that worked, though. There was a very naughty boy in the nursery and a teacher who was generally very confident with the children was asked to take charge of him. One day the boy joined a session in the room next to mine. His appearance created an atmosphere of tension. He spent the entire session running around, hi下列有关物质性质、结构的表述均正确，且存在因果关系的是（    ） 表述Ⅰ 表述Ⅱ A 在水中，NaCl的溶解度比I2的溶解度大 NaCl晶体中C1—与Na+间的作用力大于碘晶体中分子间的作用力 B 通常条件下，CH4分子比PbH4分子稳定性高 Pb的原子半径比C的大，Pb与H之间的键能比C与H间的小 C 在形成化合物时，同一主族元素的化合价相同 同一主族元素原子的最外层电子数相同 D P4O10、C6H12O6溶于水后均不导电 P4O10、C6H12O6均属于共价化合物