MPEG-4动态图像压缩标准在信息描述中首次采用了“对象”(Object)概念。
社区民警如何选择恰当的时间走访居民?
The dangerous semicircle of a typhoon in the Southern Hemisphere is that area(). measured from due south clockwise 180°。 measured from due south counterclockwise 180°。 to the left of the storm's track。 ahead of the typhoon measured from the storm's track to 90°on each side。
通用飞机机体结构通常包括哪些方面?
In cargo crane, () for lifting the load. a hoisting motor。 a luffing motor。 a mooring motor。 a slewing motor。
《危险化学品安全管理条理》共()章()条。