单选题假定以定义了一个过程sub add(a as single, b as single),则正确的调用语句是()AaddBcalladd(2*x,sin(1,57))Ccalladdx,yDcalladd(12,12,x)

单选题
假定以定义了一个过程sub add(a as single, b as single),则正确的调用语句是()
A

add

B

calladd(2*x,sin(1,57))

C

calladdx,y

D

calladd(12,12,x)


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