皮皮学，免费搜题
登录
搜题
【单选题】
在使用锥形瓶的操作中,正确的操作是( )。A.
先用铬酸洗液浸泡除去污染物,然后用氢氧化钾—乙醇液除去油污,再用洗涤灵洗洗净
B.
由于锥形瓶一般均有刻度,因此可用锥形瓶代替量筒使用
C.
将锥形瓶内溶液加热煮沸,最好是在石棉网上冷却半分钟后再用自来水冷却
D.
若锥形瓶内残留物不能用瓶刷洗去,只能用瓶刷蘸去污粉,用机械磨擦的原理清洗锥形瓶
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】阅读下面短文，根据所读内容，在文章后小题的空格里填入一个最恰当的单词。 Blood donation, also called blood banking, is a wonderful thing to do. It is an easy and direct way of a contribution to social work and having a big effect ...
【单选题】The patient in the previous question had very high blood glucose levels, and his urine also contained high blood glucose levels. The high blood glucose levels can lead to cerebral dysfunction owing to...
A.
Dehydration
B.
Reduced lipid concentrations in the blood
C.
Increased lipid concentrations in the blood
D.
Hyperhydration
E.
High ammonia levels
F.
Low ammonia levels
【单选题】The Great Wall was made not only by _______, but also the flesh and blood of ________ men.
A.
earth and stone, millions of
B.
earths and stones, millions
C.
the earth and stone, million of
D.
the earths and stones, millions
【单选题】正常足月儿的出生体重是
A.
<1000g< /div>
B.
>1000g
C.
>1500g
D.
>2000g
E.
>2500g
【简答题】Blood donation(献血), also called blood banking, is a wonderful thing to do. It is an easy and direct way to contribute to social work and help the community. It helps to save lives and helps those who ...
【单选题】The formation of blood is also known as ______.
A.
hematopoiesis
B.
hemopoiesis
C.
homopoiesis
D.
both A and B
【简答题】Blood donation, also called blood banking, is a wonderful thing to do. It is an easy and direct way to contribute to social work and help the community. It helps to save lives and helps those who are ...
【单选题】In their research, the Niculescus team found out______.
A.
the blood test method also works for women
B.
the blood test can give false results
C.
11 gene changes which lead to suicide feelings
D.
biological markers which tell who may commit suicide
相关题目：
【单选题】正常足月儿的出生体重是
A.
<1000g< /div>
B.
>1000g
C.
>1500g
D.
>2000g
E.
>2500g