单项选择题

Please identify the problems of the following title:‏
The H20 2-biosensor: based on PVP and Nano-Au‏

A．use of abbreviation
B．use of noun phrase
C．use of “:”
D．use of definite article

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单项选择题

单项选择题

Please identify the problems of the following title:‏ ​The H20 2-biosensor: based on PVP and Nano-Au‏