主页
学科
搜索
账户
常见问题
当前学科：分子生物专业验证(三级)
题目：
单选
目前常规化验室使用的步琪定氮仪的自动滴定系统是采用pH值控制滴定终点，当pH达到（）时达到滴定终点（）。
A . A、4.65
B . B、6.56
C . C、4.85
D . D、5.65
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
能够产生最大标题的HTML标签是()。
300 Hurdles Now comes the first hurdle. __1__ We all make it over this hurdle with ease. This symbolizes. Those obstacles in life that we struggle to get over, but we always manage to do so. You can look at that hurdle in two ways: "I can’t make it over, I’m too tired" or "I am one more hurdle closer to finishing this race". This is an example of taking a negative situation and seeing something positive in it. The next part of the race is every hurdle between the first and last one. __2__ This happens a lot in life too. There may be a situation that arises where you feel as though you can’t make it and all you can think about is giving up. You may fall over that "hurdle" or struggle getting over it, but somehow you find it in yourself to jump over it and move on with the race. Next is that last 100m of the race. You feel as though you just want to say, "No I can't do this." __3__. Now lastly is the last hurdle. This hurdle is the toughest out of all of them. In life we find ourselves falling and falling, and maybe getting too lost in our problems that we fell like have been though enough and there’s no hope. __4__ It's one step close to the end of the race. Once you finish, you look back on it and you realize that you made it not by leaping, but step by step. "Yard by yard, life is very hard. But inch by inch, life can be a cinch."__5__. __4__内应选（）
虹膜睫状体炎最常见于下列哪一种疾病（）
关于食管的描述错误的是（）
男性，68岁，右大腿中后部深筋膜浅层可见一肿物，大小6.5×5×4cm，切面灰白灰红色，可见坏死，光镜下瘤细胞异形性明显，形态表现为多形性，可见纤维母细胞、多核巨细胞、组织细胞和炎细胞，以瘤巨细胞最多，部分区域可见车辐状结构。该患者病理诊断为（）。
（）默认工作表名是正确的。
下列沉积亚相中完全属于诲相的一组是（）。
一般大宗材料，运距在100Km以上的远程运输，应选用（）。
塑料制品的老化属仓储商品的（）变化。
GIS开发一般有系统调查、（）、系统设计、系统实施、（）、（）六个阶段。