有机磷农药中毒的毒蕈碱样症状，下列哪一项是错误的（）
A.食欲减退
B.腹痛腹泻
C.多汗、流涎
D.瞳孔缩小
E.瞳孔放大
参考答案：E
It is easy to be thankful for the good things, ________ a life of rich fulfillment comes to those who are also thankful for the setbacks. [ ]
A. that
B. which
C. while
D. when
液压（）的作用是根据负载流量的需要而使油泵自动变量。
A、减压阀
B、卸荷阀
C、伺服阀
D、单向阀
