题干

小强在用天平和量筒测量石块的密度时,设计了如下步骤:①在量筒内倒入适量的水,读出水的体积记为V1;②用天平称出石块的质量,记为m;③将天平放在水平台面上,调节天平平衡;④把石块浸没在水中,读出水面对应的刻度记为V2.你认为最合理的实验顺序是(  )

A:①④②③

B:①④③②

C:②③①④

D:③②①④

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D

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    Speaking in public is most people's least favorite thing. The reason is that we are all afraid of making fools of ourselves.____

    But stop biting your finger-nails. Public speaking is easy. It's just plain talking, and you talk all the time. Although I'm basically shy (honest!), I've been making speeches and talking on radio and television for more than 30 years, and I can tell you that public speaking is not a “gift” like musical talent.____ Here are some of the lessons I have learned:

    Your audience is going to come away with one or two of your main ideas. One or two. Not ten or 20.____ And if you don't have a clear idea of what you want to say, there's no way your audience will.____— how you are going to open, what major points you want to make and how you're going to close.

    When I do a radio or TV piece, I often write the last sentence first.____ A strong close is critical: the last thing you say is what your audience will most likely remember.

    The standard length of a vaudeville (杂耍) act is usually 12 minutes. If all those performers singing and dancing their hearts out couldn't go on longer without boring the audience, what makes you think you can?

A. Some people are born to be good at making speeches.

B. Anybody who can talk can speak in public.

C. Try to relax yourself before making the speech.

D. The more important the speech is, the more frightened we become.

E. If you can't express in a sentence or two what you intend to get across, then your speech is not focused well enough.

F. When you know where you're headed, you can choose any route to get there.

G. No matter how long or short your speech is, you've got to get your ducks in a row.