[单选] The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm （）.
A . to the right of the storm's track B . measured from true north clockwise to 180°T C . measured from true north counterclockwise to 180°T D . between the ship's heading and the bearing to the eye
通用飞机设计技术包括哪些？
渠道系统成本中的宣传品印刷费、赠品费、展览费、促销人员劳务费等属于（）。 直接推销费。 市场促销费。 渠道成员代理费。 厂商自建渠道成本。
视频或影像是具有交互性的图像。
图像数字化就是把连续的空间位置和亮度离散化。
什么是智能材料？
The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm （）.
