皮皮学，免费搜题
登录
搜题
【单选题】
采用亚硝酸钠滴定法测定磺胺甲 噁 唑原料药的含量时,滴定时将滴定管尖端插入液面下 2 / 3 处的目的是( )A.
防止空气中的氧气氧化滴定液
B.
防止液体溅出
C.
加快反应速度，使反应进行得更加充分
D.
避免亚硝酸钠在酸性条件下形成的亚硝酸挥发和分解
E.
防止滴定管尖端产生气泡
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】下列关于急性肾衰竭血液透析的护理措施,错误的是
【单选题】3. When he began six years ago, he faced a _____ task. Paint was flaking and chunks of plaster were detached from the limestone walls. Insects nested in corners. A. florist B. flagrant C. fran...
A.
a person who owns or works in a shop/store that sells flowers and plants 花商
B.
(of an action 行动) shocking because it is done in a very obvious way and shows no respect for people, laws, etc. 骇人听闻的；公然的；罪恶昭彰的
C.
匆忙混乱的;紧张忙乱的 If an activity is frantic, things are done quickly and in an energetic but disorganized way, because there is very little time.
D.
having or showing very strong and sincere feelings about sth 热情的；热诚的；热烈的
【单选题】The florist is a _____________ .
A.
businessman
B.
plantman
C.
entrepreneur
D.
all of the above
【单选题】The reason why the 55-year-old Hispanic woman became a florist is that ______.
A.
she no longer had hair
B.
she hated to meet very rude people
C.
she did not like civil service jobs
D.
midlife career switch was a widespread practice
【单选题】下列不属于动物福利 3R 原则的是
A.
Reduction 减少
B.
Replacement 替代
C.
Requirement 需要
D.
Refinement 优化
相关题目：
【单选题】The florist is a _____________ .
A.
businessman
B.
plantman
C.
entrepreneur
D.
all of the above