下列哪一种药物不属于补气药______    A．党参  B．黄芪  C．甘草    D．白术  E．当归

单项选择题猪2 月龄,关节肿胀,跛行。关节液涂片,革兰氏染色见蓝紫色、短链状排列的细菌,该病最可能的病原是

多项选择题The meeting rooms usually vary in size, accommodating two to hundreds of people with advanced equipment such as_______. A. auditorium B. projector C. video-camera D. personnel like translator E. interpreter and messengers