被称为继北魏贾思勰《齐民要术》之后又一部古代农业科技的重要文献的是泰和曾安止的（）

A.《农器谱》

B.《农书》

C.《禾谱》

D.《齐民要术》

The Coordinator Surface Search (CSS) in a SAR situation should display by night（）.

A.deck lights forward and aft

B.a white light over two red lights

C.a red light，white light，and blue light in a vertical line

D.a distinctive signal promulgated by the CSS