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问题 单项选择题

患者女，24岁。因停经6周诊断为早孕，行人工流产术。术中出现心动过缓、血压下降、面色苍白、出汗胸闷等症状。

预防术中出现上述临床表现，应采用的方法是

A．尽可能缩短操作时间

B．术中负压不宜太低

C．选用大号扩张器扩张宫颈

D．采用镇痛药或宫颈扩张药

E．预防使用升压药

答案

参考答案：D

单项选择题

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 teacher (3) his mother and he felt (4) of her appearance. Although she was a beautiful woman, there was a severe sear (疤痕) that (5) nearly the entire right side of her face. The boy never wanted to (6) why or how she got the sear.At the meeting, the people were (7) by the kindness and natural beauty of his mother (8) the sear, but the little boy was still embarrassed (尴尬) 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 moment, 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.

第（3）空应选择（）

A．noticed 

B．greeted 

C．accepted 

D．met
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单项选择题

与5’-AGC-3’密码子相应的tRNA的反密码子应该是（）。

A、5’-AGC-3’

B、5’-GCT-3’

C、5’-GCU-3’

D、3’-GCU-5’

E、3’-GCT-5’
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