休克病人补液量的调节主要依据
A．血压B．脉搏C．尿量D．中心静脉压E．精神状态
参考答案：D
-Do you know him well?
-Sure. We __________ friends since ten years ago.[ ]
A. were
B. have been
C. have become
D. have made
离子色谱法测定水中可吸附有机卤素时，如何制备纯化活性炭？
