阅读下列短文，从每小题所给的A、B、C、D四个选项中选出最佳选项。

     This week, I ask my students about fashion. I show each student seven things and ask their opinions(看法)about each thing. Some of their answers are interesting! Here is what the students in Class 8 like:

     Jodie Smith likes the key ring. Her friend Jordan says he can't stand (忍受)the scarf. “It's for old people!” He says. William Jones loves the wallet, and his classmate Gina Taylor loves the watch. Ann Rice doesn't like the watch, but she really likes the hair clip! Jerry Green likes the sunglasses. And the coolest thing is the belt! Everyone love it.

梁启超在《变法通议》中写道：同治初年，德相俾斯麦对人说：“三十年后，日本其兴，国其弱乎?日人之游欧洲者，讨论学业，讲究官制，归而行之；中人之游一欧洲者，询某厂船之利，某厂价值之廉，购而用之。强弱之原，其在此乎。”梁启超这段话的根本意图是

叶片的结构由____、____和____三部分组成。

化学是一门以实验为基础的自然科学，初中化学课上做过许多实验，根据下列三个实验，回答问题：

我国古代有许多脍炙人口的成语，下列成语来源于春秋战国时期的一组是（　　）