题目

根据句意及首字母、汉语提示完成单词。【1】Mr.Liis s____________(严肃的) about selling the house. He needs a lot of money.【2】Li Lei won first prize in the English Speech _____________ (比赛).【3】Do you think it's n______________(必要的) to have a friend who is popular in school?【4】The Internet makes our life nicer, e______________(更容易的) and more colorful【5】I'm more o_________________(外向的) than my sister.世界上最长的跨海大桥--杭州湾跨海大桥于2008年5月1日正式通车．两主塔与它们之间的斜拉索构成美轮美奂的对称造型，现测得跨海大桥主塔AB、CD之间的距离BD为448米，主塔AB的一根斜拉索AF的仰角为∠AFB=28.2°，且EF的长度为36米，则该桥的主塔AB高为 米．（精确到米，sin28.2°≈0.473，cos28.2°≈0.881，tan28.2°≈0.536）