题目

 不同元素的气态原子失去最外层一个电子所需要的能量(设其为E)如图所示。 试根据元素在同期表中的位置，分析图中曲线的变化特点，并回答下列问题。 (1)同主族内不同元素的E值变化的特点是_________________________________。各主 族中E值的这种变化特点体现了元素性质的____________变化规律。 (2)同周期内，随原子序数增大，E值增大。但个别元素的E值出现反常现象。试预测下列关系式中正确的是________(填写编号，多选倒扣)。 ①E(砷)>E(硒)②E(砷)<E(硒)I’m told that during an international game of chess, many beautiful moves could be made on a chessboard. In a decisive ______ in which Marshall was matched with a Russian master player, he found his queen under serious attack. There were several ways of ______, and since the queen is the most ______ piece, the audience thought Marshall would ______ move his queen to safety.Deep in thought, Marshall used all his time to ______ the condition. And then, he ______ his queen, paused, and placed it down on the most ______ square of all — a square from which the queen could be ______ by any one of three enemy pieces.Marshall had sacrificed (牺牲) his queen — an unthinkable move. Everyone else was ______.Then, the Russian and the players realized that Marshall had actually made a ______ move. It was clear that no matter how the game was taken, the Russian would soon be in a losing ______. Seeing this, the Russian ______ his defeat.When the audience ______ from the shock of Marshall’s daring, they showered the chessboard with money. Marshall had achieved ______ in a very unusual and daring way — he had ______ by sacrificing the queen.To me, it is not important that Marshall won,______ what counts is that he had ______ standard thinking to make such a ______. He had looked further the usual patterns of play and had been ______ to consider an imaginative risk on the basis of his judgment alone. No matter how the game ______, Marshall was the winner.【1】A. experience B. step C. game D. situation【2】A. support B. attack C. protection D. escape【3】A. powerful B. attractive C. reliable D. valuable【4】A. regularly B. naturally C. frequently D. quietly【5】A. check B. recognize C. consider D. improve【6】A. picked up B. cared about C. turned to D. watched over【7】A. doubtful B. useless C. peaceful D. dangerous【8】A. ignored B. caught C. replaced D. discovered【9】A. frightened B. shocked C. determined D. excited【10】A. wise B. wrong C. calm D. difficult【11】A. journey B. action C. fight D. position【12】A. settled B. rescued C. admitted D. expected【13】A. recovered B. suffered C. came D. removed【14】A. prize B. victory C. progress D. attention【15】A. competed B. performed C. arisen D. won【16】A. as B. so C. but D. or【17】A. gone through B. broken with C. relied on D. dealt with【18】A. joke B. blow C. surprise D. move【19】A. willing B. active C. serious D. worried【20】A. started B. changed C. ended D. continued