地球被称之为“水球”，是因为海洋占了地球表面积的[ ]
A、71%
B、29%
C、61%
D、39%
答案：A
有机磷农药中毒的发病机制主要是有机磷抑制了（）
A.胆碱酯酶
B.6-磷酸葡萄糖脱氢酶
C.细胞色素氧化酶
D.糜蛋白酶
E.乳酸脱氢酶
Which of the following signs or symptoms would be of least importance when the nurse evaluates the client for postoperative peripheral nerve damage()
A. Pain.
B. Bleeding.
C. Altered sensation.
D. Pulselessness.
