单项选择题
具有砾状结构的沉积岩是( )。
A.生物化学岩
B.砾岩
C.砂岩
D.角砾岩
具有砾状结构的沉积岩是( )。
A.生物化学岩
B.砾岩
C.砂岩
D.角砾岩
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单项选择题
Whatis wrong about the development of news?()
Whatis wrong about the development of news?()
A.After
the camera is widely used, the picture news will flourish.
B.After
the application of TV and camera, there will be live news.
C.The
emergence of VR technology will give birth to panoramic news.
D.Panoramic
news can be broadcast in the traditional way without new platform.