目前，德国经济远超英国，已成为欧洲经济最发达的国家。虽然欧洲的经济最近几年非常不稳定，但是德国国内生产总值（GDP）却是逐年增加，2014年德国GDP总值达到了3．85万亿美元，2016年有望突破4万亿美元的大关。德国的发展与其实行的市场经济模式不可分割。下列关于德国市场经济模式认识正确的是（    ）

根据短文内容，把下列句子补充完整。

    In China, most students go to school by bike or by bus. If the school is not far, they can walk to school every day. Few students are late for school. But things are different in other countries. In many Western countries, students live far from their schools and they have different ways to get to school. Many of them go by subway. In some cities, there are double-deck buses. This kind of bus has two floors and it can carry more people. So, some Students can take a double-deck bus to school. In some cold countries, it often snows. The students in town may take a school bus. But the students in villages far from the school have to go by sledge (雪橇) because there is snow everywhere. Sometimes, the students may be late for school. If it snows heavily, the students can only study at home. Guess, in which country, students may go to school by bus?

如图是小科完成CO₂的制取、收集和验满的主要操作过程，其中需要纠正的是（  ）