A、从右下向左上倾斜的曲线
B、从右上向左下倾斜的曲线
C、从左下向右上倾斜的曲线
D、从左上向右下倾斜的曲线<br style='font: 14px/21px Tahoma, Microsoft Yahei, Simsun; color: rgb(68, 68, 68); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; word-wrap: break-word; widows: 1; font-size-adjust: none; font-stretch: normal; background-color: rgb(255, 255, 255); -webkit-text-stroke-width: 0px;'>
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