急性有机磷农药中毒时，可出现的瞳孔变化是（）。
A.瞳孔正常
B.瞳孔针尖样大小
C.瞳孔散大
D.瞳孔缩小
E.双侧瞳孔不等大
参考答案：B
As technological advances put more and more time between early school life and the young person's final access to specialized work, the stage of ______ becomes an even more marked and conscious period.
A．adolescence
B．adjacency
C．advantage
D．adventure
什么是水泵的特性曲线？
