如图界面左边为空气，右边为玻璃，一束光从空气射向玻璃，图中已画出折射光线，请作出入射光线和反射光线．

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    Jack is six years old. He has no sisters. But he has a brother. His brother's name is Mike. Jack likes eating apples, oranges and bananas. Sometimes he eats some of his brother's apples. And his brother often beats（打）him for this. He doesn't like Mike. This September he goes to school. It's the ninth（第九） day at school. Jack and his classmates are having a new lesson.

    "Jack, what is five minus（减） three, please？" asks the teacher.

    "It's…it's…"

    "Now, listen to me," says the teacher, "If your sister has five apples, and you eat three of them…"

    "But I have no sisters." Jack says.

    "Oh, sorry. But do you have any brothers？"

    "Yes."

    "Now, if your brother has five apples, and you eat three of them, tell me now…？"

    "He'll certainly beat me," Jack says quickly.

在一次主题班会上，同学们说出了以下观点，正确的是（    ）

    这来的便是闰土。虽然我一见便知道是闰土，但又不是我这记忆上的闰土了。他身材增加了一倍；先前的     的圆脸，已经变作灰黄，而且加上了很深的皱纹；眼睛也像他父亲一样周围都肿得通红，这我知道，在海边种地的人，终日吹着海风，大抵是这样的。他头上是一顶破毡帽，身上只一件极薄的棉衣，浑身瑟索着；手里提着一个纸包和一支长烟管，那手也不是我所记记得的     的手，却又粗又笨而且并裂，像是松树皮了。