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有关实验的叙述,正确的是

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  • 【名词&注释】

    毛茛科(ranunculaceae)、金属元素(metal elements)、答题卡(answer sheet)、十字花科(cruciferae)、反应时、主要特征(main features)、容量瓶(volumetric flask)、课间休息(intermission)、第一节(first quarter)、风媒传粉(anemophilous pollination)

  • [单选题]有关实验的叙述,正确的是

  • A. 将固体加入容量瓶(volumetric flask)中溶解并稀释至刻度,配制成一定物质的量浓度的溶液
    B. 用玻璃棒蘸取溶液,点在湿润的pH试纸上测定其pH
    C. 用NaOH溶液洗涤并灼烧铂丝后,再进行焰色反应
    D. 读取滴定管内液体的体积,俯视读数导致读数偏小

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]Now that we\'ve discussed our problem, are people happy with the decisions_________?
  • A. taking
    B. take
    C. taken
    D. to take

  • [单选题]毛茛科的( )是一适应风媒传粉(anemophilous pollination)的类群。
  • A. 铁线莲属
    B. 翠雀属
    C. 毛茛属
    D. 黄连属

  • [单选题]53____
  • A. rollin
    B. floating
    C. drawing
    D. flashing

  • [单选题]回答听力部分时,请先将答案标在试卷上,听力部分结束前,你将有两分钟的时间将你的答案转涂到客观答题卡上。第一节(first quarter)(共5小题:每小题1.5分,满分7.5分)
  • A. 听下面5段对话。每段对话后有一个小题,从题中所给的ABC三个选项中选出最佳选项,并标在试卷的相应位置。挺完美段对话后,你有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
    B. 例:How much is the shirt?
    C. £19.15
    D. B £.9.15
    E. C . £9.18
    G. 1. Why will dorotl de on the weeknd?
    H. Go out weeknd end
    I. Work on her paper.
    J. Make some plans.

  • [单选题]Which of the following is TRUE about the plan?
  • A. Ninety-five theatres have received funding.
    B. Everyone will get at least one free ticket.
    C. It may not benefit all the young people.
    D. Free tickets are offered once every day.

  • [单选题]聚药雄蕊是哪一科植物的主要特征?( )
  • A. 锦葵科
    B. 菊科
    C. 十字花科
    D. 忍冬科

  • [单选题]根据文章,回答 60~63 问题BIt was the first mow of winter -- an exciting day for every, child but not for most tether. Up until now, l had been able to dress myself for recess(课间休息(intermission)), but today I would need some help. Miss Finlayson, my kindergarten teacher at Princess Elizabeth School near Hamilton, Ontario, had been through first snow days ,tony times in her long career, but I think struggled still remember this one.
  • A. I managed to get into my wool snow pants. But I straggled with my jacket because it didn’t fit well. It was a hand-me-down from my brother, and it made me wonder why I had to wear his ugly clothes. At least my hat and matching scarf were mine, and they were quite pretty. Finally it was time to have Miss Finlayson help me with my boots. In her calm, motherly voice she said, "By the end of winter, you will be able to put on own boots. “ I didn’t realize at the time that this was more a statement of hope than of confidence.
    B. I handed her my boots and stuck out my foot. Like most children, I expected the adult to do an the work. After mush wiggling and pushing, she managed to get first one into place and then, with a sigh, worked the second one on too.
    C. ”With the grace that only experience can bring,she struggled to get the boots off and went through the joyless task of putting them on again.Then I said,“These aren’t my boots.you know.”As she pulled the offending boots from my feet,she still managed to look both helpful and interested.Once they were off.I said,“They are my brother’s boots.My mother makes me wear them,and I hate them!” Somehow,from long years of practice,she managed to act as though I wasn’t an annoying little girl.She pushed and shoved.less gently this time,and the boots were returned to their proper place on my feet.With a great sigh of relief,seeing the end of her struggle with me,she asked,“Now,where are your gloves?’’
    D. “I didn’t want to lose them.so I put them into the toes of my boots.”
    E. ( )
    F. the wool snow pants and the jacket
    G. the jacket and the boots
    H. the jacket and the hat
    I. the boots and the gloves

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