题干

实物粒子和光都具有波粒二象性,下列事实中突出体现波动性的是(      )

A:电子束通过双缝实验后可以形成干涉图样

B:β射线在云室中穿过会留下清晰的径迹

C:人们利慢中子衍射来研究晶体的结构

D:人们利用电子显微镜观测物质的微观结构

E:光电效应实验中,光电子的最大初动能与入射光的频率有关,与入射光的强度无关

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答案(点此获取答案解析)

A,C,D

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                                                                                       (D)

    Many people havegreat difficulty in saying goodbye. But from goodbye moments, we canalways learn something.

    Once, I overheard (无意中听到)a father and daughter in their goodbye moment. The father said, “I love you, Iwish you enough.” The daughter answered, “Daddy, our life together has beenmore than enough. Your lover is all that I need. I wish you enough, too, Daddy.”

    They kissed and she left …

    The fatherwalked over towards me. I could see he wanted and needed a cry. He came over tome and asked, “Did you ever say a forever goodbye to someone?” Before I couldanswer, he went on, “I am old and she lives much too far away. I know her nexttrip back would be for my funeral (葬礼).”

   “When youwere saying goodbye I heard you say, ‘I wish you enough.’ May I ask whatthat means?”

    He began tosmile, “It's a wish that has come down from my great-great-grandparents.And my parents used to say it to me.”

    He stoppedfor a moment and looked up as if trying to remember it. He smiled evenmore.

    “When wesaid ‘I wish you enough,’ we were wanting the other person to have alife full of enough good things.”

    Then, turningtowards me, he shared (分享)the following “wish” from his heart.

    I wish you enough sun to keep youbright.

    I wish you enough rain to appreciatethe sun more.

    I wish you enough happiness to keep you alive.

    I wish you enough pain so that thesmallest joys in life appear much bigger.

    I wish enough hellos to get you through thefinal goodbye.

    My friends, I wish you enough.