李家村要挖一条长800米的水渠，第一周挖了5天，共挖了120米；第二周也挖了5天，平均每天挖72米，请问两周能把这条水渠挖好吗？

①是建设文化强国的必由之路

②是树立高度文化自觉和自信的要求

③对提升人的文化素养有潜移默化的作用

④是进行精神文明建设，推动文化创新的根本途径

下列物质中含有氢分子的是(   )

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．