【简答题】如图,⊙O的直径AB=6,D为⊙O上一点,∠BAD=30°,过D点的切线交AB的延长线于点C.阴影部分的面积为______.(精确到0.01)
【单选题】She is ___ newcomer to chemistry, but she has already made some important discoveries.
【判断题】团员入党后,其档案材料交党委统一保管。()
【简答题】计算: (1) ; (2)(-14)×(-100)×(-6)×(-0.01)。
【单选题】She is ___newcomer to ____ chemistry,but she has already made some important discovery.
【单选题】The number of students in a foreign languages class ______ usually limited to no more than thirty.
【单选题】在 Web of Science 核心合集中检索标题中包含“ Wireless sensor network ”或“ Wireless sensor networks ”或“ WSN ”或“ WSNS ”的文献,其中发表论文数最多的作者是:( )
【简答题】XFB_RT ( config-subif ) #_____________________ ( 19 ) // 封装 dot1Q 协议,建立与 vlan30 的关联