问题
单项选择题
有效循环血量一般不依赖下列哪项（）。
A.充足的血容量
B.通畅的微循环
C.有效的心排出量
D.良好的周围血管张力
E.良好的左心功能
答案
参考答案：B
解析：
循环血量与血容量、心排出量、周围血管张力有关。
搜题请搜索小程序“爱下问搜题”
有效循环血量一般不依赖下列哪项（）。
A.充足的血容量
B.通畅的微循环
C.有效的心排出量
D.良好的周围血管张力
E.良好的左心功能
参考答案：B
解析：
循环血量与血容量、心排出量、周围血管张力有关。
A little boy invited his mother to attend his school’s first teacher-parent meeting. To the little boy’s ___1___, she said she would go. This ___2___ be the first time that his classmates and t eacher ___3___ his mother and he felt ___4___ of her appearance. Although she was a beautiful woman, there was a severe scar(疤痕) that ___5___ nearly the entire right side of her face. The boy never wanted to ___6___ why or how she got the scar. At the meeting, the people were ___7___ by the kindness and natural beauty of his mother ___8___ the scar, but the little boy was still embarrassed and ___9___ himself from everyone. He did, however, get within ___10___ of a conversation between his mother and his teacher. The teacher asked ___11___, “How did you get the scar on your face?” The mother replied, “___12___ my son was a baby, he was in a room that caught fire. Everyone was ___13___ afraid to go in because the fire was ___14___, so I went in. As I was running toward his bed, I saw a long piece of wood coming down and I placed myself over him trying to protect him. I was knocked ___15___ but fortunately, a fireman came in and saved both of us.” She ___16___ the burned side of her face. “This scar will be ___17___, but to this day, I have never ___18___ what I did.” At this point, the little boy came out running toward his mother with tears in his eyes. He held her in his arms and felt a great ___19___ of the sacrifice(牺牲) that his mother had made for him. He held her hand ___20___ for the rest of the day.
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