问题
单项选择题
咽及食管闭合性损伤可出现（）。
A.咳嗽及咯血、呼吸困难、气肿、局部疼痛
B.疼痛、吐血或呕血、气肿
C.颈部血肿、神经受压、脑缺血等
D.空气逸出、刺激性咳嗽、呼吸困难
E.吞咽痛、吐血、呕血、皮下气肿、颈部可见食物及唾液溢出
答案
参考答案：B
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咽及食管闭合性损伤可出现（）。
A.咳嗽及咯血、呼吸困难、气肿、局部疼痛
B.疼痛、吐血或呕血、气肿
C.颈部血肿、神经受压、脑缺血等
D.空气逸出、刺激性咳嗽、呼吸困难
E.吞咽痛、吐血、呕血、皮下气肿、颈部可见食物及唾液溢出
参考答案：B
阅读下面短文，掌握其大意，然后从21—30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 Wouldn't it be great if we didn't have to remember passwords (密码) ever again？If we could just sit in front of our computers and be 21 logged in (登录? Crave mentions how NECSoft BiodeLogon system uses face recognition technology to log you on to Windows, rather than using a 22 All you need is a webcam and your pretty face to 23 your PC. No more 24 , confusing passwords to remember or change every few months. After doing a little research, I found this type of 25 already available to consumers via a relatively 26 application called FaceCode. The 27 requires the use of a webcam to recog- nize and log PC users into their systems. You can add as many 28 as you want, provided they each have a Windows account. If the system 29 to recognize your 30 , you can recall the Windows user name and password by using a hot-key combination.
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