[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f0_rlkkz12fK3ePJ-opgNJQ1L5hsSQ8PqWYwTmzBcIw8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":24,"type":25},[],"2023-06-19 21:14:17",72699181,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},15,"dcdb5821a7cba891581b05b37a30369c","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","环境工程微生物及实验","work_28094967","第六章 微生物的生长与环境因子的影响作业","微生物对pH的要求同样存在最适、最高和最低值;过高或过低的pH对微生物的生长是有利的",[19,26,31,36,41,46,51,54,59,64],{"answer":20,"createTime":5,"id":21,"options":22,"question":23,"source":24,"type":25},[],72699175,[8,9],"生长和繁殖是两个不同而又有联系的概念.对于单细胞微生物来讲,单个微生物个体的生长表现为细胞基本成分的协调合成和细胞体积的增加,当单细胞个体生长到一定程度时,细胞以某种方式增加数量,使得个体数目增加,这是单细胞微生物的繁殖.而对多细胞微生物来说,个体生长则反映在个体的细胞数目和每个细胞内物质含量的增加;当个体生长到一定阶段,就会以某种方式增加个体的数量,就是繁殖","v1",3,{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":24,"type":25},[],72699176,[8,9],"为了研究微生物的生长,需要对微生物进行培养.微生物的培养方法可分为好氧培养和厌氧培养;还可分为固体培养和液体培养;也可分为分批培养和连续培养",{"answer":32,"createTime":5,"id":33,"options":34,"question":35,"source":24,"type":25},[],72699177,[8,9],"在微生物的分批培养过程中,随着体系内各类条件的变化,微生物的数量呈现出变化,就是所谓的生长曲线.典型的生长曲线可分为四个不同的时期:停滞期、对数期、静止期及衰亡期.每个时期都有其环境条件、微生物生长状态、数量等方面的特征",{"answer":37,"createTime":5,"id":38,"options":39,"question":40,"source":24,"type":25},[],72699178,[8,9],"在废水微生物处理过程中,活性污泥的增长过程也会出现与纯种单细胞微生物相似的生长过程.不同的水处理方式,往往是利用污泥生长曲线中的某一两个阶段.且处于不同阶段时的污泥,其特性有很大的区别",{"answer":42,"createTime":5,"id":43,"options":44,"question":45,"source":24,"type":25},[],72699179,[8,9],"微生物生长繁殖的测定,需要采取一些方法或直接或间接地对微生物的数量进行测定;微生物死亡的测定,则主要是对死菌的测定过程",{"answer":47,"createTime":5,"id":48,"options":49,"question":50,"source":24,"type":25},[],72699180,[8,9],"温度是微生物重要的生存因子.每一种微生物的生长都要求有一定的温度范围.在最适温度下,微生物生长繁殖;超过最高温度,不会导致微生物的死亡;而低于最低温度,会使微生物的生长受到抑制,但并不死亡.利用高温进行灭菌和消毒,是在实验室和实际工作中很常用的手段",{"answer":52,"createTime":5,"id":6,"options":53,"question":17,"source":24,"type":25},[],[8,9],{"answer":55,"createTime":5,"id":56,"options":57,"question":58,"source":24,"type":25},[],72699182,[8,9],"氧化还原电位(Eh)是衡量环境氧化性的指标,各种微生物对氧化还原电位的要求不同",{"answer":60,"createTime":5,"id":61,"options":62,"question":63,"source":24,"type":25},[],72699183,[8,9],"好氧微生物、兼性微生物和微生物对氧气的要求不同,水中的溶解氧(DO)是影响微生物生存和废水处理效果的重要因子之一",{"answer":65,"createTime":5,"id":66,"options":67,"question":68,"source":24,"type":25},[],72699184,[8,9],"可见光辐射和红外辐射具有负面的生物学效应,是光合型微生物的能量来源;但紫外辐射和电离辐射对微生物具有致死和致突变的作用"]