绘制路径时，调用context对象的beginPath方法后，会清除掉之前的绘制路径。

Context in SFL refers to . A: Context of language B: Context of culture C: Context of society D: Context of situation

According to Numan, context can be classified into . A: linguistic context and co-text. B: nonlinguistic context and extra-linguistic context. C: situational context and cultural context D: linguistic context and nonlinguistic context.

How to narrow the following topic “The Effects of Deforestation on Gorillas in Africa ” A: Geographical context B: Historical context C: Biological context D: Social context

HTML5中beginPath()和closePath()方法必须搭配使用

beginPath方法会清除掉之前的绘制路径。

ClosePath会结束一条路径，和BeginPath配合使用。

以下关于html5标签canvas说法正确的是（）。 A: 边框色或轮廓色fillStyle B: 线宽lineWidth C: beginPath（）开辟一条路径 D: beginPath（）开始绘制路径

3.in which context will Gordon Brown’s announcement come true? A: in the context of a much bigger national disarmament B: in the context of a much bigger international disarmament C: in the context of a much bigger local disarmament D: in the context of a much bigger regional disarmament

请简述使用canvas绘制过程中beginPath( )和closePath( )的作用。