题目：
The house next door had been empty for so long that we had quite forgotten what it was to have neighbors. One day, __36__, a great furniture lorry drew up near our front gate and a short time, all kinds of furniture were __37__ on the pavement. A small car arrived, out of which came seven people , a man a woman and five children of __38__ ages. The children rushed out and began laughing__39__ as the whole family moved into the house. Windows were __40__ open; furniture was put into__41__; and little faces looked curiously at us over the fence and disappeared. It was our first__42__ to the Robinsons. Though we became firm__43__ with our neighbors, we often had causes to be made angry by them. Our garden became an unsafe place: little boys __44__up as cowboys or Indians would jump up from somewhere, __45__wooden guns at us and __46__ us to put up our hands. Sometimes our lives were __47__; at others, we were killed with a __48__ “Bang, Bang!”. Even more dangerous were the arrows that occasionally came sailing __49__ the garden fence. But we did not __50__ go in fear for our lives. The Robinsons were friendly and helpful and when we left for our holidays, we knew we had nothing to fear __51__our neighbors were around. We understood what it was like to have __52__ in the long, dull winter evening __53__ Mr Robinson would __54__ in for a cup of tea and chat; or when Mr. Robinson would __55__ over the fence and talk endlessly with father about gardening problems.
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答案：C题目分析：同周期自左向右原子半径逐渐减小，A正确；钠溶于水生成氢氧化钠和氢气，而铝能和氢氧化钠难溶于反应生成NaAlO2和氢气，因此根据得到的是无色溶液可知，单质铝的物质的量小于钠的，B正确；在质量...
