问题：
[单选题]若有以下JavaScript程序，关于这段程序的说法，不正确的是（） varc=documentgetElementById("myCanvas"); varcxt=cgetContext("2d"); cxtfillStyle="#FF0000"; cxtfillRect(0,0,150,75);
A、先使用canvas元素的id 来寻找 canvas 元素
B、创建一个2d的 context 对象
C、cxt.fillStyle="#FF0000"把整个画布设置为指定颜色
D、cxt.fillRect(0,0,150,75)语句绘制了一个矩形
参考答案：
C
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