题目内容

下列因素中哪项一般不会明显增加心脏耗氧量?

A. 心率加快
B. 心肌收缩性增强
C. 回心血量增加
D. 外周血管扩张
E. 左室射血阻力增加

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下列哪项因素与心肌兴奋-收缩偶联障碍无关

A. 肌钙蛋白活性下降
B. 肌球蛋白ATP活性下降
C. 肌浆网Ca2+释放能力下降
D. 肌浆网Ca2+储存量下降
E. Ca2+内流障碍

与心室舒张功能障碍有关的因素是

A. 肌浆网释放Ca2+增多
B. 肌球-肌动蛋白复合体解离障碍
C. 心肌能量缺乏
D. 心肌收缩性增强

心肌收缩性减弱的机制包括

A. 心肌收缩蛋白破坏
B. 心肌能量代谢障碍
C. 心肌兴奋-收缩偶联障碍
D. 心肌细胞变性坏死

Direction:Listen to a short passage and fill in the blanks.[音频]Every time when I read the five thousand years old Chinese history, I am moved and __1__ by those earthshaking惊天动地的 heroes. Emperor Qin Shi Huang, Li Shiming, Zhao Kuangyin…I am also a _2_ creature of god, and the end product of thousands of years of evolution进化. Therefore, I am better __3_ in both mind and body than all the emperors and wise men who preceded在..之前,先于 me.As long as I am crazy, and __4__ the limits, I will have hope. I will never give up a chance of being a hero. Only mediocre普通的 people are easily satisfied. I am a mediocre person _5_. Mediocrity is alien to与...相异me, just like the fire and water. I will _6__ my limits again and again, never allow myself to bring regrets and __7__ into my grave.I will never give up a chance of being a hero. Life is only once. Anybody will die no matter what he will do. It may lie in different roads _8_ the same ending. While the key to life lies in these different roads, I will walk the journey bravely and rigidly and exert运用,施加 my __9__ completely.Great era provides everyone great _10__. My destiny is in my hand. I will try my best to carry forward my life. There is only one self in the world. I will walk only once in this world.I will never give up a chance of being a hero.

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