皮皮学，免费搜题
登录
搜题
【单选题】
下列是关于“检测土壤中细菌总数”实验操作的叙述,其中错误的是A.
用蒸馏水配制牛肉膏蛋白膝培养基,经高温、高压灭菌后倒平板
B.
取10 4 、10 5 、10 6 倍的土壤稀释液和无菌水各0.1ml,分别涂布于各组平板上
C.
将实验组和对照组平板倒置,37 0 C恒温培养24-48小时
D.
确定对照组无菌后,选择菌落数在300以上的实验组平板进行计数
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
【简答题】Erica: Hi, Daniel. What’s your plan for your future? Daniel: I would like to ___________________. Erica: What business will you do? Daniel: As you know, I _________________ software engineerin...
【简答题】乙烯一氯乙烯共聚粒子、其中乙烯单体单元占40%、氯乙烯单体单元占60%
【简答题】油画的分类有哪些?
【简答题】What can cause problems for Americans when they do business with Latin cultures?
【简答题】Watch the video.Write the correct word or phrase to complete each sentence. 1.Erica says to Renee,"Hey,I'll have to______." 2.Jay says to Erica," ______hanging up the phone?" 3.Erica replies,"Sorry.My...
【单选题】So little ________ about science that the lecture was my understanding.A．I know; overB．knew I; b
A.
35. So little ________ about science that the lecture was my understanding. A．I know; over
B.
knew I; beyond
C.
did I know; beyond
D.
did I know; over
【简答题】Playing is serious business for children. In fact, it’s what they do best! Ask them why they do it, and kids will probably say, “Because it’s fun!” But it’s much more than that. It’s also good for the...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
