下列是对不同类动物生殖发育的说法，正确的是（　　）

（Ⅰ）求证：BG∥面ADEF；

（Ⅱ）求证：面DBG⊥面BDF．

如图是苍蝇的生殖和发育示意图，下列叙述错误的是（　　）

①切实保护公民的基本民主权利

②遵守宪法、法律、规则和程序

③用等额选举逐步取代差额选举

④提高公民参与民主管理的水平

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?