单项选择题

实现社会主义初级阶段奋斗目标的根本立足点是( )‏

A．改革开放
B．四项基本原则
C．以经济建设为中心
D．自力更生，艰苦创业

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单项选择题

Which one of the following is correct?
A、The output item must be given when calling function printf.
B、When calling function getchar to read in a character, we can input its corresponding ASCII code.
C、In C language, integers can be output in various forms, e.g. decimal, binary, octal and hexadecimal.
D、The header file stdio.h must be included before calling function putchar.

单项选择题

For the function f (x) = sin x / (x2 + 4x + 3), find the first 9 terms of the power series expansion when a = 0, the syntax is correct
A、syms x; f=sin(x)/(x^2+4x+3); y=taylor(f,x,'Order',9)
B、syms x; f=sin(x)/(x^2+4x+3); y=taylor(f,x,'Order',6)
C、syms x; f=sin(x)/(x^2+4x+3); y=taylor(f,x,1,'Order',9)
D、syms x; f=sin(x)/(x^2+4x+3); y=taylor(f,x,1,'Order',6)