A:竖直向上
B:竖直向下
C:由南向北
D:由西向东
一般来说,乡村聚落主要从事____ 、放牧、捕鱼、伐木等生产活动,城市聚落主要从事____ 和服务业等工作.
对《江南春》和《山行》两首诗歌的内容理解不当的一项是( )
设计对照试验时,应遵循的原则是( )
Unlike a film, __________ a passive audience watches and hears __________ is happening on the screen, Real Cine puts you into the action and connects with your senses of sight, smell and touch in an active way.