（12分）

（1）维生素C的结构简式是，它的分子式是                。由于它能防治坏血病，又称为抗坏血酸。在维生素C溶液中滴入紫色石蕊试液，溶液颜色变红，说明维生素C溶液具有       性；在维生素C溶液中滴入少量蓝色的含有淀粉的碘水，可观察到的现象是                               ，说明维生素C具有          性。

（2）氟氯代烷是一种能破坏臭氧层的物质。在大气平流层中，氟氯代烷受紫外线的照射分解出氯原子，氯原子参与下列有关反应：

①Cl＋O₃→ClO＋O₂        ②O₃O＋O₂       ③ClO+O→Cl＋O₂

上列反应的总反应式是                                                                                         ，少量氟氯代烷能破坏大量臭氧的原因是                                                                  。

There and then he calculated what force from the earth would hold the moon, and compared it with the known force of gravity at tree height. The forces agreed; Newton says laconically, "I found the answer pretty nearly." Yet they agreed only nearly: the likeness and the approximation go together, for no likeness is exact. In Newton’s science modern science is full grown.