题目

语法填空Alfred Nobel was born in Stockholm, Sweden, on October 21, 1833 but movedto Russia with his parents in 1842, where his father made a strong position for(he)in the engineering industry. After his father went bankrupt, most of the familyreturned to Sweden in 1859. Alfred Nobel had never been to middle school university,but had studied (private) and by the time he was twenty,he was a skilful chemist and excellent linguist, (speak) Swedish, Russian, German, Frenchand English. Like his father, he was imaginative and inventive, but he had betterluck in business and showed more (finance) （2007•兰州）下列是三种化合物的结构式及分子式，请按其规律，写出后一种化合物的分子式为    ．