皮皮学,免费搜题
登录
搜题
【简答题】
葡萄糖中重金属的检查:取葡萄糖4.0g,加水23ml溶解后,加醋酸盐缓冲液(pH3.5)2ml,依法检查重金属(ChP2015通则0821重金属检查法),含重金属不得过百万分之五。问赢取标准铅溶液多少毫升(每1ml相当于10μg的Pb)?
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
【单选题】Why are some tattooists called' responsible'?
A.
They want to prevent their customers from suffering latch
B.
They refuse to tattoo areas that cannot normally be covered up.
C.
They are clean and careful in their work.
D.
They carefully consider their customers' needs.
【判断题】最容易发生萌发的原料品种是根茎类和茄果类蔬菜。( )
A.
正确
B.
错误
【单选题】知识点:名词的所有格中,不以s结尾的复数名词,加's; 以s结尾的复数名词,加 ' 即可。 以下哪一个是教师节的正确表达。
A.
Teacher's Day
B.
Teachers' Day
C.
Teacher Day
D.
teacher's day
【单选题】最容易发生萌发的原料品种是 ( ) 。
A.
荚果类蔬菜
B.
食用菌类蔬菜
C.
根茎类蔬菜
D.
茄果类蔬菜
【单选题】The author seems to suggest that the restriction prohibiting customers from having their genome sequenced is______.
A.
inhuman and unethical
B.
inhuman but legal
C.
illiberal but necessary
D.
illiberal and oppressive
【单选题】FX2N-64MS的PLC型号含义是(         )。
A.
I/0点数64/基本单元/继电器输出
B.
输入点数64/基本单元/晶体管输出
C.
I/0点数64/扩展单元/晶闸管输出
D.
输入点数64/基本单元/晶闸管输出
【单选题】知识点:名词的所有格中,不以s结尾的复数名词,加's; 以s结尾的复数名词,加 ' 即可。 以下哪一个是儿童节的正确表达。
A.
Children Day
B.
Children's Day
C.
Children' Day
D.
children's day
【单选题】FX2-64MS的PLC型号含义是()。
A.
I/O点数64/基本单元/继电器输出.
B.
输入点数64/基本单元/晶体管输出
C.
I/O点数64/扩展单兀/晶闸管输出
D.
I/O点数64/基本单元/晶闸管输出
【单选题】Why are some tattooists called' responsible' ?
A.
They want to prevent their customers from suffering later.
B.
They refuse to tattoo areas that cannot normally be covered up.
C.
They are clean and careful in their work.
D.
They carefully consider their customers' needs.
【单选题】知识点:名词的所有格中,不以s结尾的复数名词,加's; 以s结尾的复数名词,加 ' 即可 。 The bookstore is near here. It's only _____ bicycle ride.
A.
half an hour'
B.
half an hour's
C.
half an hours'
D.
half an hour
相关题目: