He for ten years.[ ]
A. has been married
B. married
C. got married
D. has married
答案:A
公元前60年,西汉政府设立(),元朝对西藏、台湾等边疆地区进行了有效的管辖、开发,巩固了统一的多民族国家。
钢的含碳量增大使可焊性降低,增加冷脆性和时效敏感性,也可降低耐大气腐蚀性。( )