山重水复疑无路，____。 (陆游《游山西村》）

在晚秋或寒冬，用人造烟幕来防御霜冻的原理是（   ）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Do you like music?Do you know about Beethoven,a famous1in the world?

    He was born in Germany．His father was a singer and2Beethoven．When Beethoven was only four,his3asked him to learn different musical instruments(乐器).Beethoven loved music and he4very fast.He got high praise(赞扬）from Mozart ,the great musician at that time,5the age of seventeen.

    At that time ,it was difficult to have6happy life.Beethoven was hard-working，but it wasn't easy to make much money．One day,he found he couldn't7clearly．But he still went on working and writing music pieces．Some of his best pieces came out8he lost his heating．In 1827，9more than 300 pieces，the great musician died．But people remember his name and10today．

“螳螂扑蝉，黄雀在后”表达的生物学意义与下列吻合的是（  ）

材料一：***的诞生是中国历史上开天辟地的大事，自从有了***，中国革命的面貌就焕然一新了。

——选自人教版《中国历史》八年级上册

材料二：没有共产党就没有新中国，共产党辛劳为民族，共产党一心救中国，他指给人民解放的道路，他领导中国走向光明……没有共产党就没有新中国，没有共产党就没有新中国。