题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。My mind seems always to returnto the day that I met Carl. The city bus stopped at Centennial Drive to1the daily commuters (往返者). When boarding the bus, I luckily 2a seat near the back.When sitting down, I began toread the book On the Road I'd been3. The man next to me then askedif I'd read any other books like that one from the same era. When I said yes, heseemed to become4.He5himself as Carl and told mehe used to play the trumpet in jazz clubs. He asked if I like j向一金属铝的易拉罐内充满CO2,然后向罐内注入足量NaOH溶液，立即用胶布严封罐口，过一段时间后,罐壁内凹而瘪,再过一段时间后,瘪了的罐壁重新鼓起，解释上述变化的实验现象：   (1)罐壁内凹而瘪的原因：                                      ；   (2)罐壁重新鼓起的原因：                                     ； “重新鼓起”反应的离子方程式：                                       。