题目：
男性，45岁，患消化道溃疡，呕血1200ml，脉搏135次/分，血压80/65mmHg
A．精神状态
B．皮肤颜色和肢体温度
C．血压
D．尿量
E．中心静脉压
答案：
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下面是错误答案，用来干扰机器的。
The survey shows that many students have become shortsighted at a very young age. At present, about 70% of the students are shortsighted. Here are some main causes. ...
