问题
选择题
在图2-1中，a，b，c，d四处气压高低比较正确的是 ( )
图2-1
A．a>b>c>d
B．b>c>d>a
C．d>a>b>c
D．c>d>a>b
答案
答案：C
a处气流上升，形成低压，d处气流下沉，形成高压，a＜d，高空b>c，而垂直方向上随高度增加气压降低，a＞b。
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在图2-1中，a，b，c，d四处气压高低比较正确的是 ( )
图2-1
A．a>b>c>d
B．b>c>d>a
C．d>a>b>c
D．c>d>a>b
答案：C
a处气流上升，形成低压，d处气流下沉，形成高压，a＜d，高空b>c，而垂直方向上随高度增加气压降低，a＞b。
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my little sister and me. It was time to send wishes. My father said, "You've done 1______ things for us. On this special day, let me 2______ all the housework for you. " After kissing my mother, my sister said, "Mum, you're a 3______ mum in my eyes." 4______ at my mother's eyes and said, " Dear Mum, I am always waiting for one day when you and Dad get old. " My parents seemed puzzled (困惑) , and I explained, " When you're old, I will take care of you just like you take care of me. " There were tears in their eyes... Yes, 5______ they get old, I will take care of them. These words were in my mind 6______ a long time, and at last I said them to my dear parents. I felt 7______ happy. My parents are just common people, 8______ they're great. Like other parents, they bring us up with love, and give us food and 9______.They teach us how to be real people. My parents have done a lot of things for me and I am very thankful to them. However, they will not always be able to take care of me. One day, they will get old. They may not even be able to take care of 10______. But that doesn't matter. I, their child, will take charge. |