下列哪项指标说明心电运动试验阳性（）
A.运动诱发典型心绞痛
B.运动中及运动后2分钟内出现以S波为主的导联出现下垂型、水平型ST段下移
C.运动中舒张期血压下降
D.运动中及运动后10分钟内出现以S波为主的导联出现下垂型、水平型ST段下移
E.运动中及运动后5分钟内出现以S波为主的导联出现下垂型、水平型ST段下移
参考答案：A
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| I sat down to read under an old tree in the park. I felt my life was 1 , for my whole world was dark. A young boy ran up to me, out of 2 . He stood right before me with his head down and said 3 , "Look what I found!" In his hand was a flower, and what a poor sight! The flower was dry and 4 . I gave him a small smile and then turned my eyes away so that he could take his dry flower and go off to play. 5 , he sat next to my side and placed the flower to his 6 and said in surprise, "It smells sweet and it's beautiful, too. That's 7 I picked it. Here, it's for you." The flower before me was dead. But I knew I must 8 it, or he might never leave. So I accepted the flower, and replied, "This is just what I 9 ." Just then, for the first time I noticed that the boy could not 10 －he was blind. Tears (眼泪) came down my face as I 11 him for picking the best one. "You're welcome." he smiled, and then ran off to 12 . I sat there and wondered how he was able to learn about my pain (痛苦). Through the eyes of a blind child, 13 I could see the problem was not with the world; the problem was me. And for all those years I myself had been 14 . I decided to see the beauty in life, and 15 every second of my life. And then I held that dry flower up to my nose and breathed in the smell of a beautiful rose. | ||||
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