题目

阅读每个小题,从方框内选择正确的短语,将其适当形式填入空白处。 set about set out be in favor of be capable of in a mess bring back bring up in search of pick up make a breakthrough identify with come to sb's rescue (1) I a few words of Greek when I was there lastyear. (2) The idea that robots any labor tasks is broadly true in theory. (3) The boy who fell into theriver wouldn't have died if the young man . (4) Research is now beingundertaken an explanation for thephenomenon. (5) O(14分)X、Y、Z、W为短周期的四种元素,其最高正价依次为+1、+3、+5、+7,核电荷数按照Z、X、Y、W的顺序增大。已知Z的原子次外层的电子数为2,W、X原子次外层电子数为8。(1)请写出元素Y的原子结构示意图:                             ;其中元素W在周期表中的位置:                               。(2)用电子式表示X与W形成化合物的过程:                                              。(3)X、Y、Z、W的原子半径由大到小的顺序为:                             。(用元素符号表示)(4)请写出W的单质与X的最高价氧化物对应水化物反应的化学方程式:                                                                                         。(5)元素X与元素Y相比,金属性较强的是              (用元素符号表示),请举一例实验事实证明这一结论:                                                                        
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