在仔猪补料时加入适量下列哪种能量饲料可防止仔猪腹泻（）。
A、玉米
B、小麦
C、大麦
D、高粱
参考答案：D
I ______ an English teacher for ten years. [ ]
A. have taught
B. have been
C. taught
D. teached
痉病虚证治则为
A．益气活血
B．滋养营阴
C．养阴清热
D．和营生津
E．滋补肝肾
