在金属材料中,以()抗腐蚀疲劳性最好。 ["A.碳素钢","B.低合金钢","C.不锈钢","D.耐热钢"]
大型高炉的Hu/D.的范围是() ["2.0~2.3","2.3~2.5","2.5~3.1","3.0~3.3"]
我国资产负债表的格式是()。 ["报告","多步式","账户式","单"]
银行承兑汇票手续费按票面金额的()计收。银行承兑逾期垫款按每日垫款金额的()计收利息。 ["万分之五、千分之五","千分之五、千分之五","万分之五、万分之五","千分之五、万分之五"]
农耕技术的发明与改进,推动了农业经济的发展。比较右侧两图,其中图8(1)所示的耕作技术始见于() ["战国","秦","西汉","东汉"]
儿童高发的呼吸道传染病有()等。