有机磷农药中毒患者最早出现的症状是（）
A.中间期综合征
B.迟发性神经病
C.中枢神经系统症状
D.烟碱样症状
E.毒蕈碱样症状
参考答案：E
—Do you know how many people _____ in the earthquake in that area?
— That's terrible. I hope everything _____ in the world now. [ ]
A. lose their lives; go well
B. lost their lives; goes well
C. lose their lives; goes well
D. lost their life; go well
试讨论影响高效液相色谱（HPLC）分离度的各种因素，如何提高分离度？
