A

    TheSoundofMusic is one of the most popular American movies. And the song DoReMi in the movie is also popular in the world.

The movie tells a story about a tutor, Maria. She is a young and outgoing woman. She goes to look after a family with seven children. Their family name is Von Trapp. Mr. Von Trapp is a captain. He and his family live in Austria.

    The family are very sad after the children's mother, Mrs. Von Trapp, died. Nobody takes care of the children. They cry and shout every day. The lonely father often becomes angry because of the noisy children.

    Maria often teaches them to sing lively songs and perform short, funny plays. At first the father is almost mad, but the children's smiling faces make him happy again. Then Mr. Von Trapp falls in love with Maria. At last they get married.

西北地区降水稀少、气候干旱的原因是（　　）

从课文《冰灯》父子的对话中，你还能感受到什么？

如果盖盖玻片的方法不恰当，很容易出现气泡，影响观察效果．下列四种盖盖玻片的方法中，最不容易出现气泡的是（图中半扁圆形结构代表水滴，箭头代表盖盖玻片的方向）（  ）