问题 解答题

如果一次失血超过1200-1500毫升,就会有生命危险.______.

答案

人体内的血量是相对稳定的,成年人的血量为体重的7%~8%.医学研究证明,如果一次失血不超过400ml,血浆和血细胞可以在短时间内通过自身的调节作用恢复到正常水平.当失血量在800-1000毫升时即20%,会出现面色、口唇苍白,皮肤出冷汗,手脚冰冷、无力,呼吸急促,脉搏快而微弱等症状,可以输血;当失血量超过1200毫升时即30%,生命就会发生危险;当失血量达到1500毫升以上即35%左右时,可引起大脑供血不足,伤者会出现视物模糊、口渴、头晕、神志不清或焦躁不安,甚至昏迷等症状,必须立即输血.可见题中的叙述是正确的.

故答案为:√

完形填空
完形填空:(每个小题1分,共20分)
One afternoon I was sitting at my favorite table in a restaurant, waiting for the food I had ordered to arrive. Suddenly I    21     that a man sitting at a table near the window kept glancing in my direction,    22    he knew me. The man had a newspaper     23   in front of him, which he was    24    to read , but I could    25    that he was keeping an eye on me . when the waiter brought my     26   the man was clearly puzzled (困惑) by the    27    way in which the waiter and I    28    each other. He seemed even more puzzled as     29   went on and it became     30    that all the waiters in the restaurant knew me. Finally he got up and went into the    31    . When he came out , he paid his bill and    32     without another glance in my direction .
I called the owner of the restaurant and asked what the man had    33    . “Well,” he said , “that man was a detective (侦探) . He    34    you here because he though you were the man he     35    .” “What ?” I said , showing my     36    . The owner continued , “He came into the kitchen and showed me a photo of the wanted man. I   37     say he looked very much like you ! Of course , since we know you , we told him that he had made a     38   .” “Well , it’s really    39    I came to a restaurant where I’m known ,” I said . “   40    , I might have been in trouble .”
小题1:
A.knewB.understoodC.noticedD.recognized
小题2:
A.since B.even if C.thoughD.as if
小题3:
A.flatB.open C.cut D.fixed
小题4:
A.hopingB.thinking C.pretendingD.continuing
小题5:
A.seeB.find C.guessD.learn
小题6:
A.menuB.billC.paperD.food
小题7:
A.directB.familiarC.strangeD.funny
小题8:
A.chatted withB.looked atC.laughed at D.talked about
小题9:
A.the waiterB.time C.ID.the dinner
小题10:
A.trueB.hopefulC.clearD.possible
小题11:
A.restaurantB.washroomC.officeD.kitchen
小题12:
A.leftB.acted C.sat down D.calmed down
小题13:
A.wanted B.tried C.orderedD.wished
小题14:
A.met B.caught C.followed D.discovered
小题15:
A.was to beat B.was dealing with C.was to meet D.was looking for
小题16:
A.careB.surprise C.worry D.regret
小题17:
A.mustB.can C.need D.may
小题18:
A.discovery B.mistake C.decision D.fortune
小题19:
A.a pityB.natural C.a chance D.lucky
小题20:
A.ThusB.However C.Otherwise D.Therefore
单项选择题