下列哪种舌象变化不可能是生理现象() ["儿童舌质偏淡","女性月经期舌质偏红","老年人舌质偏暗","冬季舌面偏润","小儿出现吐弄舌"]
何谓静脉注射/静脉血标本采集法?它的目的是什么?
环境污染的概念是() ["污染物质使环境的构成或状态发生了变化","污染物质扰乱和破坏了生态系统","污染物影响了人们正常生活的条件","污染物危害了人体健康","以上都是"]
可以减少植物对硒吸收的方法是在高硒土壤中施入() ["草木灰","碳酸钙","碳酸铵","农家肥","尿素"]
慢性砷中毒可引起人体() ["皮肤瘙痒","骨软化","皮肤角化","视野缩小","骨质硬化"]
肌内注射法的注意事项是什么?