【查阅资料】NaBr+H₂SO₄=NaHSO₄+HBr

溴乙烷是无色液体，沸点38.4℃，密度1.44g/cm³．

【合成反应】在a中加入20mL 95%的乙醇和20mL水，在搅拌、冷却下，缓慢加入40mL浓硫酸．再加入30g溴化钠和几粒碎瓷片，d中加入少量冰水并置于冰水浴e中．b中通入冷却水后，小火加热a，直到c处无油滴滴出，结束反应．

【分离提纯】将d中馏出液转入分液漏斗中，静置，将有机层转入另一锥形瓶并置于冰水浴中冷却；在振荡下向有机液中逐滴加入4mL浓硫酸，再用干燥的分液漏斗分去硫酸层．最后通过蒸馏得到纯净的溴乙烷．

请回答下列问题：

    Many people think pizza comes from America, but some people think pizza is

____ Italian food. In fact, pizza has a long history. The ancient Greeks (古代希腊人) first had the idea of putting vegetables on ____ of bread. Then people found "pizza ____In Roman cities.

    Raffaele Esposito, a baker (面包师) from Naples, didn't begin to ____ the first modem pizza until the 19^th century. It was one day in the ____ in 1889. This baker went to Italy as a(n) ____. The Italian King and Queen asked him to make pizza. That was when first pizza Margherita was made. It was named after (以……命名) the Queen. Pizza became a favorite ____in Italy. People often saw it on people s ____ Parents often ____ the/r children's lunch boxes with pizza But ____pizza really became an international dish after the Second World War (第二次世界大战).

鹧鸪天·薄命妾辞

元好问

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