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Which of the following statements is true according to what was said in the recording?
8月上旬,某奶牛场的奶牛发生一次迅速流行的发热性疾病。病牛高热,体温高达41℃左右,精神委顿,食欲废绝,鼻镜干燥,呼吸加快(每分钟达80次以上),大量流涎,口角出现多量泡沫状黏液,头颈伸直,张口伸舌,呼吸极度困难,喘气声粗厉如拉风箱,肺泡音及支气管音增强;眼结膜充血浮肿,流泪,流鼻液呈黏性线状;喜卧懒动,严重者卧地不起;孕牛发生流产,有的产出死胎。大多数病牛的病情经3d左右逐渐减轻,很少发生死亡该场本次最可能发生的疾病是()
信号是指示列车运行及调车作业的命令,铁路信号分为视觉信号和听觉信号。
一般来说,发展中国家的旅游换汇率要()其他出口商品。
库与文件夹不能等同。
使用Φ40.8mm的焊丝进行焊接时,要采用氩气和二氧化碳的混合气;使用40.6mm的焊丝焊接时,可以不采用氩气和二氧化碳的混合气。
公募活动应当遵循什么原则?
总义齿排牙时, 切缘与 平面的关系为()
为什么企业可以建立、实施一体化管理体系?
员工完全独立地确定他们自己的需要具有缺陷性,这主要不是因为()。
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