The_____ was horrible, because in a short time, thousands of soldiers _____ fell into the sea,___.

A．scene; aboard；dead.

B． scene; aboard；died

C．scenery; aboard；dead.

D．scene, abroad, dead.

收集教育文献与情报资料的原则有（）、尽量掌握第一手资料的原则、（）的原则和县普查后阅读的原则。