[填空题] 毒物根据用途和来源分为：___________、___________、___________、_________。

下列哪一项是休克患者的危重征象() ["A．神志淡漠","B．伴代谢性酸中毒","C．收缩压低于80mmHg","D．脉搏细速120次/分","E．皮肤出现多处瘀点、瘀斑"] 抗休克首要而基本的措施是() ["A．扩充血容量","B．消除病因","C．防止肾衰竭","D．纠正酸中毒","E．纠正电解质紊乱"] 患者男性，50岁，患胃十二指肠溃疡，突然大量呕血600ml左右，并出现烦躁不安、面色苍白、四肢湿冷。脉搏108次/分，血压14/12kPa。考虑患者已发生() ["A．虚脱","B．轻度休克","C．中度休克","D．重度休克","E．尚未休克"] 下列哪项是休克早期的临床表现() ["A．血压下降","B．发绀、四肢厥冷","C．神志淡漠","D．脉压变小尿量减少","E．抽血时血液黏稠易凝"] 中毒的预防包括：______________、____________、_____________、_____________、___________。 毒物根据用途和来源分为：___________、___________、___________、_________。