皮皮学，免费搜题
登录
搜题
【单选题】
下列关于苯甲酸与苯甲酸钠防腐剂的表述,错误的是A.
在酸性条件下抑菌效果较好，最佳pH值为4
B.
相同浓度的苯甲酸与苯甲酸钠盐其抑菌作用相同
C.
pH增高，苯甲酸解离度增大，抑菌活性下降
D.
苯甲酸与金类防腐剂合用具有防霉与防发酵作用
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】What can be inferred about the baggage boys?
A.
They could earn much, but they had to work hard.
B.
Many of them earned money in a dishonest way.
C.
They were all from poor families.
D.
They were all thin, young boys.
【简答题】完型填空 John was ten years old, but he was still 1 Grade One. He liked 2 . and didn't work hard 3 his lessons. His parents always wanted him 4 a good boy. This afternoon John 5 back, he was very happy. H...
【简答题】Jim Doherty may not be a born farmer, but he ____ ____ without too much trouble. Not that he has had it easy. That first hard winter he faced must have left him with the _________ to give up and go ba...
【简答题】铺货就是厂家(或代理商)送货给()，并尽力说服其经销产品。
【简答题】患儿，男，8岁。感冒数天，现出现高热，心烦口渴，出汗，舌红苔黄，脉洪大。宜首选的药物是（ ）
【简答题】Most of us probably live without vegetables,but a world without chocolate? Now that would be hard! According to chocolate makers it could happen if we don ’ t act soon. There are two main causes of th...
【单选题】患儿，男，8岁。因“低热、于咳、疲乏、食欲减退3周入院”。患儿于3周前无明显诱因出现低热，最高体温38.1℃，夜间易出汗，间中咳嗽、无痰。患儿祖父为开放性结核病患者，患儿未接种卡介苗。针对该患儿的主要护理措施不妥的是
A.
监测体温
B.
保证营养摄入
C.
指导合理用药
D.
注意消毒隔离
E.
绝对卧床休息
相关题目：
参考解析：
知识点：
题目纠错 0
发布
