主页
学科
搜索
账户
常见问题
当前学科:高级食品检验工
题目:
单选
沉淀重量法中,沉淀经灼烧转为称量式。下列有关对称量式的要求的叙述中不正确的是()
A . 组成必须与化学相符合
B . 称量式必须十分稳定
C . 称量式不易吸潮且与沉淀式一致
D . 称量式的分子量要大
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:
实施胸外心脏按压的正确部位是()。
U形管换热器适用于两流体温差大、特别是管内流体清洁的高温、高压、介质腐蚀性强的场合。()
Sixteen-year-old Maria was waiting in line at the airport in Santo Domingo. She was leaving her native country to join her sister in the United States. She spoke English very well. Though she was very happy she could go abroad, she was feeling sad at leaving her family and friends. As she was thinking all about this, she suddenly heard the airline employee asking her to pick up her luggage and put it on the scales (称). Maria pulled and pulled. The bag was too heavy and she just couldn't lift it up. The man behind her got very impatient. He, too, was waiting to check in his luggage.
钢丝绳中,纤维芯的作用是什么?
发现有顾客寻找收银机结账时,收银员不应说()。
DS-1-45WT智能型信号电源屏1#屏中输入模块有()。
在一定范围之内,氢的析出超电位与电流密度的关系服从()关系。
服小柴胡汤后出现口渴属于()。
地形图比例尺分母大,比例尺大,表示地形详细。()
取烘干的基准物Na2CO30.1500g,溶于水,以甲基橙为指示剂,用HCl标准滴定溶液滴定至终点,消耗25.00mL,则HCl的浓度为()mol/L。