问题
单项选择题
What is the normal pH range for arterial blood ？（）
A．7.00 to 7.49.
B．7.35 to 7.45.
C．7.50 to 7.60.
D．7.55 to 7.65.
答案
参考答案：B
解析：
A pH less than 7.35 is indicative of acidosis; a pH above 7.45 indicates alkalosis.