问题
单项选择题
二尖瓣狭窄伴肺动脉高压的体征是（）。
A.肺动脉瓣区第二心音亢进或伴分裂
B.肺动脉瓣区第一心音亢进或伴分裂
C.肺动脉瓣区第二心音减低或伴分裂
D.肺动脉瓣区第一心音减低或伴分裂
E.肺动脉瓣区第二心音消失
答案
参考答案：A
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二尖瓣狭窄伴肺动脉高压的体征是（）。
A.肺动脉瓣区第二心音亢进或伴分裂
B.肺动脉瓣区第一心音亢进或伴分裂
C.肺动脉瓣区第二心音减低或伴分裂
D.肺动脉瓣区第一心音减低或伴分裂
E.肺动脉瓣区第二心音消失
参考答案：A
(2013·高考重庆卷，B)It is easy to overlook the role that your body plays in influencing your mood(情绪)．When you are____，you may find yourself blaming work pressures or an unknown future.However，it could just be that you’ve been sitting behind your desk too long. One way to improve your mood is____.Psychologically，it provides you with a break from the stresses in your life.Also，in the process，you may aim for____goals，like a new personal running record or a better body shape.The achievement of a particular goal makes you feel good and contributes to your____.That is why exercise has been shown to____your selfrespect. You do not have to train yourself____to feel the psychological benefits of exercise.What really matters is____，not intensity(强度)of your exercise.You can try walking for 30 minutes five times per week or simply gardening on weekends.
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