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.