(2011•卢湾区二模)化简:12−1−(3+2)
(2011•卢湾区二模)化简:12−1−(3+2)
(2011•卢湾区二模)在(2x+1x
2011卢湾区二模数学(理科)
(2009•卢湾区二模)方程3+2x=x
(2012•卢湾区二模)不等式|x-2|≤1的解集是______.
(2009•卢湾区二模)已知f(x)=1−x,当θ∈(5π4,3π2)时,f(sin2θ)-f(-sin2θ)可化简为(
(2009•卢湾区二模)在方程x
(2011•卢湾区二模)下列物质中属于纯净物的是( )
(2011•卢湾区二模)下列物质互为同素异形体的是( )
(2011•卢湾区二模)下列化学方程式符合题意且书写正确的是( )
(2011•卢湾区二模)已知集合A={x|x=cos
(2009•卢湾区二模)若函数f(x)=2sin