急性心梗合并左心衰给硝酸甘油的作用机制不是() A.降低左心室后负荷 B.降低左心室

题型:单项选择题

问题:

急性心梗合并左心衰给硝酸甘油的作用机制不是()

A.降低左心室后负荷

B.降低左心室前负荷

C.降低心肌耗氧量

D.扩张冠状动脉

E.降低心率

考点:上海住院医师麻醉科神经内科神经内科题库
题型:单项选择题

依次填入下段文字中括号里的词语,最恰当的一组是:( ) 艾青说:“我所努力的对诗的要求是四个方面:______,有意识地避免用华丽词藻来掩饰空虚;______,以一个意象来表明一个感觉和观念;______,以全部力量去完成自己所选择的主题;______,不含糊其词,不写为人费解的思想,决不让读者误解和坠五里雾中。”

A.朴素 集中 单纯 明快

B.单纯 朴素 明快 集中

C.朴素 单纯 集中 明快

D.单纯 集中 明快 朴素

题型:单项选择题
Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in the blank with the word or phrase that best fits the context.
Recently I overheard a father and daughter in their last moments together at the airport. The airline had announced her        and standing near the security gate, they hugged and he said, “I love you. I wish you enough.” She        said, “Dad, our life together has been more than enough. Your love is all I ever needed. I wish you enough, too, Dad.” They kissed and she left.
He walked over toward the window where I was seated. Standing there I could see he wanted and needed to       . I tried not to interrupt him, but he        me in by asking, “Did you ever say good-bye to someone knowing it would be forever?”
“Yes, I have,” I replied. “Forgive me for asking, but why is this a forever good-bye?” “I am        and she lives much too far away. I have        ahead, and the reality is, the next trip back will be for my funeral” he said.
“When you were saying good-bye I heard you say, ‘I wish you enough’. May I ask what that means?”
He began to smile. “That’s a wish that has been        for many generations within my family. My parents        say it to everyone.”
He paused for a moment, looking up as if trying to remember it       , and then he smiled and        the following:
  “I wish you enough sun to keep your attitude bright.
  I wish you enough rain to appreciate the sun more.
  I wish you enough happiness to keep your spirit alive.
  I wish you enough pain so that the smallest joys in life appear much       .
  I wish you enough gain to satisfy your wanting.
  I wish you enough        to appreciate all that you possess.
  I wish you enough ‘Hellos’ to get you enough the final ‘Good-byes’.”
  Then he walked away, leaving me lost in thought.
小题1:
A.arrivalB.regretC.departureD.joy
小题2:
A.in generalB.in publicC.in particularD.in turn
小题3:
A.cryB.restC.sit downD.talk
小题4:
A.showedB.ledC.tookD.welcomed
小题5:
A.illB.strongC.oldD.brave
小题6:
A.storiesB.challengesC.tripsD.jobs
小题7:
A.handed overB.handed downC.handed inD.handed out
小题8:
A.ought toB.had toC.used toD.were able to
小题9:
A.in detailB.in heartC.in memoryD.in general
小题10:
A.talkedB.sharedC.criedD.declared
小题11:
A.bigger B.worseC.sweeterD.better
小题12:
A.successB.gainC.sorrowD.loss
题型:单项选择题

如图所示,跳伞运动员在从飞机上跳下、降落伞没有打开之前,下落会越来越快,此时运动员受到的阻力______重力;当降落伞打开后,运动员匀速下落时,受到的阻力______重力.(选填“大于”、“小于”或“等于”)

题型:单项选择题

网络时代是一个“信息过剩而注意力稀缺”的时代,以网络为基础的当代经济本质是“注意力经济”。在这种经济形态中,最重要的资源是注意力,因此在互联网上如何吸引注意力成为一个非常重要的问题。网络时代对注意力的经济价值的强调无疑是必需的,但如果忽视了对吸引注意力的道德评价和精神意义,却会导致对注意力缺乏应有的人文关怀和起码的尊重,以至于会有人利用网络手段的便捷性和隐匿性,通过不实和不良信息去浪费、污染、践踏他人的注意力,这无疑也是一种严重的精神伤害。
根据这段文字,可以看出作者的意图是( )。

A.呼吁网络时代要善用注意力,珍视其精神和文化价值
B.强调网络时代如何吸引注意力是创造经济价值的关键
C.强调网络时代忽略了对吸引注意力的道德评价
D.呼吁应加强对网络注意力污染和扭曲的管理

题型:单项选择题

见于巨幼细胞性贫血()。

A.轻度皮肤黏膜出血伴骨髓增生减低,雄激素治疗有效

B.血小板数量减少伴巨核细胞成熟障碍

C.红系增生活跃,骨髓细胞外铁消失

D.维生素B12、叶酸测定下降,骨穿示巨幼性改变

E.严重内脏出血伴三系血细胞下降,骨髓多部位增生极度低下,无巨幼细胞

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