问题
单项选择题
下列关于正常人Q波的描述错误的是（）。
A.Q波振幅<1/4R
B.Q波时间<0.03秒
C.aVR导联可见深而宽的Q波
D.V1导联可呈QS波
E.V1~V2导联应有q波
答案
参考答案：E
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下列关于正常人Q波的描述错误的是（）。
A.Q波振幅<1/4R
B.Q波时间<0.03秒
C.aVR导联可见深而宽的Q波
D.V1导联可呈QS波
E.V1~V2导联应有q波
参考答案：E
It was at a concert that I happened to find David. He was holding his head at a strange 36 as if he were staring down at something. Then the truth 37 me. He was blind. The last thing he remembers seeingwas his daughter being born. Then the whole world went 38 . Bad luck is no stranger to this 44-year-old man. His mother died of cancer, and his weak father had to 39 11-year-old David to the 40 of the state. Things seemed always to go for 41 . Two years ago, his beloved guide dog pulled him out of the pathof a truck. David was not 42 . The dog died. But David does not feel sorry for himself. “These are just little obstacles(障碍困难) you have to 43 in your life,” he said. He has to make a daily two-hour trip to his working place—the X-ray department of an 44 room. It was a hard job to 45 by. Before he got it, David was determined to escape the workshop run by the Lighthouse, an organization 46 to helping blind people. He wanted a job of developing X-ray film, a job 47 everyone, not just he, must work in the dark, including those with 48 eyesight. The Lighthouse called many hospitals, with no result, 49 they offered to pay his first three months’ salary. David works alone in a dark room that 50 of chemicals. He doesn’t wear gloves. Otherwise, he could not feel. 51 this is an emergency room, lives can be put either 52 or out of danger. His director says he trusts him 100 percent. He makes $20,000 a year. But his motivation goes 53 money. “By working I can realize my own 54 . That’s what really counts!” he said. What a shining example for us to 55 !
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