问题 单项选择题

用做铁水罐内衬的耐火材料,被侵蚀程度最轻的是()

A.粘土砖

B.高铝砖

C.碳化硅砖

答案

参考答案:C

问答题

       在抗美援朝战争中,中国人民志愿军的主要作战对象是世界上最强大的工业国——美国,它拥有第一流的军事技术和武器装备;而中华人民共和国刚刚成立,百废待兴,国内困难重重,但战争的结果却是中朝人民取得了胜利。请你说说中国取得抗美援朝战争胜利的原因有哪些?

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

单项选择题