有机磷农药中毒的主要症状是：
A.毒蕈样症状
B.烟碱样症状
C.呼吸系统症状
D.中枢神经系统症状
E.消化系统症状
参考答案：A, B, D
病案记录不签名是医师不负责任的表现，法律上届无效记录，而代签名或有意、无意模仿他人签名是越权、违法行为。
He was told that it would be at least three more months _______he could recover and return to work.
A．when
B．before
C．since
D．that
