临床上最常见的酸碱失衡是()。 ["呼吸性酸中毒","呼吸性碱中毒","代谢性酸中毒","代谢性碱中毒","呼吸性酸中毒合并代谢性酸中毒"]
气态污染物的种类很多,主要有()。 ["硫氧化物","氮氧化物","粉尘","一氧化碳","碳氢化合物"]
直肠癌晚期恶病质可出现:() ["便血","腹胀、腹痛、肠鸣音亢进","贫血、无力、极度消瘦","大便变扁、变细","黄疸"]
颗粒污染物主要有()。 ["尘粒","粉尘","烟尘","雾尘","碳氢化合物"]
直肠癌肝转移:() ["排尿不畅","肝大","直肠内剧烈持续性疼痛","恶病质","肛门部溃疡"]
物流服务实现产业化必须具有哪些前提条件?