休克的特殊监测指标包括（）。
A.动脉血乳酸盐测定
B.中心静脉压
C.心排出量
D.肺毛细血管楔压
E.血细胞比容
参考答案：A, B, C, D
22. —Mr. Smith _____ in Russia for 10 years.
—No wonder he can speak Russian fluently and now teaches Russian in a Chinese college.
had stayed B. has stayed C. stayed D. stays
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