已知函数f(x)=sinxcosx+sin2x,
(1)求f(x)的值域和最小正周期;
(2)设α∈(0,π),且f(α)=1,求α的值。
解:(1)
,
因为,
所以,
(2)
But for the metal cage to pull the miners to safety, the miners in Chile ____ in less than twenty-four hours.
A.would not be rescued
B.would not have been rescued
C.would be rescued
D.would have been rescued
旧路改建路基加宽施工中,正确的做法有()。
A.施工前应截断流向拓宽作业区的水源,开挖临时排水沟,保证施工期间排水通畅
B.老路堤高度小于2m时,老路堤坡面处理后,可直接填筑新路堤
C.可以将老路基的边坡清挖物用作新路堤填料
D.拓宽部分的路堤应采用非透水性填料填筑
E.当加宽拼接宽度小于0.75m时,可采取超宽填筑或翻挖原有路基等工程措施