单项选择题
下列代码段star_number1="star2"star_number2="star3"print(star_number1+star_number2)结果是()
A.star5B.star3star2C.star2star3D.star23
A.22B.27C.99D.9
A.print(’hello!,2021年!’)B.print ’hello!,2021年!’C.print"(hello!,2021年!)"D.print("hello!,2021年!’)