在canvas图形绘制中,路径只是草稿,真正绘制线必须执行stroke()方法根据路径进行描边。
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onclick代表当前事件类型为鼠标单击事件。
A. 对
B. 错
分析如下的JavaScript代码段,并写出运行后的结果。var num = 10;function fn(){num = 20;alert(num)}alert(num)
SectionD-1Volunteersareourheartandsoul.Pleasecomeandhelpusbuildhomesfor___1___low-incomefamilies.Thereisnoexperienceneededandwesupplythe____2____.Justvolunteerforaday.It’sfun,rewardingandyoucanlearnsome____3____.Ifbuildingisn’tyourthing,comeandvolunteerforoneofoureventsor____4____.Youmustbe____5____14yearsofagetovolunteerandthose15yearsandundermustcomewithaparent.Comeandsignupnowtovolunteeryourtime.
冲泡时间过长,茶多酚渗出物多,导致茶汤()
A. 涩
B. 鲜
C. 甜
D. 甘