A:女真
B:匈奴
C:契丹
D:党项
如图所示,在同一竖直面内有多根交于O点的光滑直杆具有不同的倾角,每根直杆上均套有一个小环.使它们同时从O点由静止释放,则此后的某个相同时刻,这些小环所处的位置将处于( )
One day Eddie and Hobo looked at the ____. Eddie thought he saw a____but Hobo thought it was a ____. Because Hobo saw one ____. Eddie thought there were many bright ____and it was too____, so it couldn't be a plane.
下列关于中国民族工业发展历程的叙述,正确的是( )
下列不属于叶绿体中色素功能的是( )
You can ____ ____ or____ ____ ____ ____ in winter.