题目内容

机体代谢中酸碱平衡作用最强的缓冲系统是

A. 碳酸氢钠/碳酸缓冲系统
B. 磷酸氢盐缓冲系统
C. 血红蛋白及氧合血红蛋白缓冲系统
D. 碳酸氢钾/碳酸缓冲系统
E. 蛋白质缓冲系统

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血气分析时,标本的采集处理中,错误的做法是

A. 采动脉血或动脉化毛细血管血
B. 以肝素抗凝
C. 立即分析
D. 不须与空气隔绝
E. 测定前将血液混匀

We must make the most efficient use of the _____ financial resource听力

A. available
B. automatic
C. assemble
D. attribute

We had what we hoped would be enough money to sustain us for about a year if we traveled on a tight _____.

A. bargain
B. belt
C. bar
D. budget

The building _____ as an indirect result of the heavy rain.

A. corrupted
B. collapsed
C. constructed
D. composed

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