【单选题】We visited the museum, ____ was set up in memory of those killed in the 2008 Wenchuan Earthquake.
【单选题】数据库的基本结构中,指出了每个数据的逻辑定义及数据间的逻辑联系的是()
【单选题】我国南方某湖泊流域水体污染,主要表现为藻类大量繁殖浮于水面,水生动物因缺氧而大量死亡,水质出现异臭,无法作为饮用水水源,使水体出现这种现象的主要污染物是?
【单选题】Set up in 2008, the business is _________right in the city center, close to the railway station.
【单选题】扩大的多中心临床试验,遵循随机对照原则,进一步评价有效性、安全性( )
【单选题】Set up inn 2008,the business is___right in the city centre, close to the railway station.
【简答题】(3)(-6 3 左 )-(-3.6) (2) -3 4 ÷ 4 她 ×(- 2 3 ) 2 (3)( 3 2 - 3 3 - 3 4 )×(-32) (4)4+(-2) 3 ×左-(-0.2m)÷4.
【简答题】计算下列各题: (1)-4-2×32+(-2×32); (2)(-48)+(-2) 2 -(-25)×(-4)+(-2) 2 ; (3)(- 1 3 )×(-3) 3 -0.25÷(-2) 2 ×|-2| 4 .