把抛物线y=x2+bx+4的图像向右平移3个单位，再向下平移2个单位，所得图像的解析式为y=x2-2x+3，则b的值为（ ）。
4
The major goal of USB was to define an external expansion bus which makes adding (71) to a PC as easy as hooking up a telephone to a wall-jack. USB 2.0 is an evolution of the USB 1.1 (72) , providing a higher performance interface.
A．peripherals
B．outside
C．inside
D．beside
我国回族人民喜欢食用牛羊肉及无鳞食物。
