下列化石可以证明鸟类可能起源于古代爬行类的是（　　）

“纵然游遍美丽的宫殿享尽荣华富贵，但是无论我在哪里，都怀念我的家。”诗人之所以这样说是因为（  ）

膳食纤维被称为人体内的第七大营养素，所以平时我们应多吃一些鸡蛋和豆腐．

    Jeff is fifteen now, but he's still in Grade One. He likes playing1, he often plays it with his friends, but he does not like to use his head. He does not listen to his2in class, so he can not do his homework. His teachers don't like him. They tell his parents3it, and they do not know what to do.

    It's Sunday today. Jeff gets up4in the morning. After breakfast, his mother tells him to do his homework. He goes to his bedroom.5his mother is busy with her housework, Jeff goes out with a ball. Now it's time for lunch, but she can't 6Jeff.

    Later he comes back. His parents look very angry, but say7. After lunch, Jeff wants to go out again. His father stops him and8, “Is your homework over?''

    “No,” answers the boy, “I can't do it.” His father pulls(拉、拽)him by the9and says, “Where is your ear?” “Oh，dear!" Jeff calls out, “It's in your10.”

阅读下面文言文选段，完成下题。

      【甲】王曰：“善。”乃下令：“群臣吏民能面刺寡人之过者，受上赏；上书谏寡人者，受中赏；能谤讥于市朝，闻寡人之耳者，受下赏。”令初下，群臣进谏，门庭若市；数月之后，时时而间进；期年之后，虽欲言，无可进者。燕、赵、韩、魏闻之，皆朝于齐。此所谓战胜于朝廷。

（节选自《战国策》）

      【乙】（唐）太宗谓侍臣①曰：“往昔初平京师②，宫中美女珍玩，无院不满。炀帝③意犹不足，征求无已，兼东西征讨，穷兵黩武，百姓不堪，遂致亡灭。此皆朕所目见。故夙夜孜孜④，惟欲清净，使天下无事。遂得徭役不兴，年谷丰稔⑤，百姓安乐。 夫治国犹如栽树本根不摇则枝叶茂荣。君能清净，百姓何得不安乐乎？”

节选自《贞观政要》）

      【注释】①侍臣：身边的大臣。②京师：京城。此指隋朝京城大兴（今陕西西安市）．③炀帝：指隋朝末代皇帝杨广。④孜孜：勤恳的样子。⑤稔（rěn）：丰收。