简述流挂及其种类。
参考答案：
在涂覆和固化期涂膜出现的下边缘较厚或流痕的现象。可分为下沉、流挂、流淌等。
请仿照例句，以“孤独”为话题，分别再写一个句子。要求语意连贯，句式一致，与例句修辞手法相同。（6分）
例句①：孤独不是秋日孤雁的离索，那是一只展翅的雏鹰拟化明朝飞翔的方向，是一种生命的沉思。
例句②：孤独是身居闹市的一颗苍松，惯看人生沧桑、岁月轮回却无人倾诉的慨叹，是一种深深的遗憾。
单词拼写
Sunday, April 6th, Sunny
We went to Beijing on ___小题1:___(度假) today. The weather was ___小题2:__（晴朗的）.We__小题3:___（参观） the Great Wall in the morning. It is the ____小题4:__(最长的)in the world. There were many people there. I took quite a few ___小题5:___（照片）of the Great Wall. The guide there was very ___小题6:__（友好的）to us. She told us ___小题7:__（某些）about Beijing. The food in Beijing is very ___小题8:__（美味的). I __小题9:__(真的)like Beijing duck . We ate a lot in a restaurant. I have a good __小题10:__(时间) in Beijing.
