问题
问答题 简答题
用元素符号及数字表示物质分子组成的化学式叫做分子式，如苯的分子式为“C6H6”，它包含了那四方面意义？
答案
参考答案：
1.代表苯的一个分子；
2.显示了组成苯分子的元素品种和数量；
3.可计算出分子量；
4.组成苯的碳原子和氢原子的相互比例。
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用元素符号及数字表示物质分子组成的化学式叫做分子式，如苯的分子式为“C6H6”，它包含了那四方面意义？
参考答案：
1.代表苯的一个分子；
2.显示了组成苯分子的元素品种和数量；
3.可计算出分子量；
4.组成苯的碳原子和氢原子的相互比例。
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| One evening after dinner, Mr. and Mrs. Bond called a family meeting."We've to make a _1 _ decision,"Mr. Bond announced."You see, your mother has been offered a post as codirector of a TV station in Chicago._2_,the station is not here. After _3_ long and hard about it, we've _4 that the right decision is to move to Chicago." Marc looked _5_, while his sister Rachel breathlessly started asking when they'd be moving."It's surprising, but exciting," she said.Marc simply said," I can't leave my _6_. I'd rather stay here and live with Tommy Lyons!" The Bonds hoped that by the time they moved to Chicago in August, Marc would grow more _7_ the idea of leaving. However, he showed no _ 8 of accepting the decision, refusing to __9_ his belongings. On the morning of their move, Marc was nowhere to be _10_. His parents called Tommy Lyons' house, but Mrs. Lyons said she hadn't seen Marc. Mrs. Bond became increasingly _11_ while her husband felt angry with their son for behaving so _12_. What they didn't know was that Marc had started to walk up to Tommy's house with a faint idea of __13__ in the Lyons' attic (阁楼) for a few days. However, as he walked along all the _14_ landscape of his neighborhood _15_ him of the things he and his family had done together: the green fence he and his mother had painted; the trees he and his sister used to _16_ while playing hideandseek; the park _17_ he and his father often took walks together. How much would these _18_ without his family, who made them special in the first place? Marc didn't spend _19_ answering that question but instead, he hurried back to his house, _20_ if there were any boxes of the right size to hold his record collection. | |||
| ( )1.A.different ( )2.A.Besides ( )3.A.discussing ( )4.A.known ( )5.A.shocked ( )6.A.classmates ( )7.A.delighted at ( )8.A.ways ( )9.A.pack ( )10．A.observed ( )11．A.anxious ( )12．A.impatiently ( )13．A.hiding ( )14．A.beautiful ( )15．A.recalled ( )16．A.plant ( )17．A.which ( )18．A.cost ( )19．A.time ( )20．A.looking | B．Quick B．However B．Quarrelling B．Recognized B．puzzled B．friends B．pleased with B．signs B．collect B．watched B．angry B．irregularly B．staying B．familiar B．remembered B．water B．where B．value B．courage B．wondering | C．wise C．Therefore C．complaining C．concluded C．discouraged C．neighbours C．used to C．interests C．tie C．found C．frightened C．irresponsibly C．sleeping C．splendid C．warned C．climb C．that C．mean C．strength C．asking | D．final D．Anyhow D．thinking D．insisted D．excited D．parents D．worried about D．hopes D．pile D．noticed D．miserable D．selflessly D．living D．modern D．reminded D．hide D．what D．measure D．patience D．expecting |