陈旭麓认为：“民族的反思，是在遭遇极大的困难中产生的。一百多年来，中华民族的第一次反思是在鸦片战争后……第二次则是反思何以学了西方仍然失败。”其中“第二次反思”对近代化的推进主要是（    ）

小江学习了密度的知识后想动手测量盐水的密度，他把托盘天平放在水平台面上，将标尺上的游码移到零刻度处，发现指针偏向分度盘右边，要将天平调平衡，则应将右端的平衡螺母向____ （“左”、“右”）调．天平调平后，他将适量的盐水倒入量筒中，测出其体积为60cm³，然后用天平测出了空烧杯的质量为10g，再将量筒中的盐水倒入烧杯，测量盐水和烧杯的总质量，天平平衡后右盘中的砝码和游码在标尺上的位置如图所示，则其总质量是　____ 　g，则他算出该盐水的密度是　____ 　g/cm³．分析该测量过程，你认为小江测出的盐水密度比真实值____ （选填“大”、“小”）．

    (D)

    How to talk to someone you don't know? It depends on the situation(情形).

    If one of your friends introduce you to a new friend, it would be OK to start talking about the person who introduces you. You may ask him/ her how they knew each other. Show you are interested in it, even if you aren't. Nod after he/ she talks. This will give you more time to listen to what he/ she says, and think about next question from his/ her talking.

    Now if you go to a class on the first day where you do not know anyone, the first thing you should remember is not to be shy when talking to other people. You may remember when you were in the first or second grade, someone would just walk up to you and talk to you. Be open, but think before you talk.

    When it comes to meeting people face to face for the first time, find a situation which both of you are in. Maybe you are sitting next to each other. Maybe the other person says something you don't understand. Find a situation that seems proper (恰当的). Start with a simple conversation. It may seem strange at first. But the more you talk and take action with them, the more they will like you.

如图是研究牛顿第一定律的实验示意图，每次让小车从斜面同一高度由静止开始滑下，是为了使它在下列三种不同平面上 ____，平面越光滑，小车受到的摩擦力越小，速度减小得越慢，由此推理可知；如果小车所受的摩擦力为零，小车将以 ____的速度永远运动下去．

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