第9题: [单项选择]2月龄犊牛,从43日龄开始出现腹泻、腹胀、消瘦,精神逐渐变差,异食,经用各种抗菌消炎药和助消化药均无效。就诊时骨瘦如柴,精神委顿,行走摇晃,被毛逆立,腹围增大,体温正常,腹泻,粪呈白色[假设信息]如果粪便检查发现寄生虫卵,圆形或椭圆形,呈葵花状,结合临诊症状表现,最有可能的寄生虫是() A. 后圆线虫 B. 仰口血矛线虫 C. 姜片吸虫 D. 弓首蛔虫 E. 绦虫 参考答案:D
第27题:[判断题] The amount of value a firm creates is measured by the difference between its costs of production and the price that it charges for its products. A.正确 B.错误 参考答案:B