how many pandas are there in the zoo-----()ANoneBno oneCnoD not one

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howmanypandasarethereinthezoo-----()ANoneBnooneCnoDnotonehowmanypandasarethereinthezoo-----()ANoneBn

how many pandas are there in the zoo-----()ANoneBno oneCnoD not one
how many pandas are there in the zoo-----()
ANone
Bno one
Cno
D not one

how many pandas are there in the zoo-----()ANoneBno oneCnoD not one
A None
因为有具体的对象,即:熊猫,此时,一般用None.
请在客户端右上角评价点“满意”即可