—How was your climbing Mount. Huang?

—I didn't believe I could do it ___________ I got to the top.

关于城市空间结构的各功能区的叙述，正确的是（　）

如图是某化学反应的微观模拟示意图，下列说法正确的是（   ）

读下列古诗，按要求答题。

                                                                                                        村   夜
                                                                                                         白居易
                                                                                      霜草苍苍虫切切， 村南村北行人绝。
                                                                                      独出门前望野田， 月明荞麦花如雪。