吉林市（下图）是吉林省下辖地级市、吉林省第二大城市、东北地区重要旅游城市，位于吉林省中部偏东，距省会长春124千米，是“雾凇之都”。吉林雾凇是中国四大自然奇观之一，每年12月下旬到翌年2月是观赏吉林雾凇的最佳时节，从丰满水电站到吉林市区的沿江两岸经常集中出现雾凇。雾凇俗称树挂，是过冷水滴（温度低于零度）碰撞到同样低于冻结温度的物体时形成的。

分析吉林松花江沿岸出现十里雾凇的地理条件，并说明吉林市开发“雾凇冰雪节”的有利条件。

中华民族在近百年艰苦卓绝的伟大复兴历程中，关键是“中国新生”和“伟大转折”，实现了国家的独立与富强。“中国新生”和“伟大转折”分别是指（    ）

SiO₂俗称石英砂，是光导纤维的主要成分，下列关于SiO₂的有关叙述正确的是(　　)

    Three small fish lived in the sea. When they were very young, their parents died. They had to 1 each other day after day. Finally, they grew up and are 2 enough to swim deeper and further.

    One morning. the three fish were 3 to a shallow (浅) water by a big wave (浪). A small boat was taken there, too. It was hard for the fish to go back to the sea because the boat was right in front of them. The largest fish realized that they were 4 and said they had to find a way to leave there as quickly as possible. The second largest fish 5 with his elder brother, but the youngest one did not. He said that there was much 6 for their activities, so he would not worry at all and still swam around 7. At last, the largest fish returned to the 8 by jumping over the lowest part of the boat. The second largest fish also succeeded in 9 his elder brother in the other side of water. But the youngest one didn't follow them and still swam joyfully.

    Two hours later, when the 10 rose up, the water in the small shallow corner dried up. The fish who did not try to return to the sea died of lack(缺乏) of water.