A:2NaOH + H2SO4 = Na2SO4+2H2O
B:Ba(OH)2+2HCl = BaCl2+2H2O
C:Cu(OH)2+ 2HNO3=Cu(NO3)2+2H2O
D:KOH+ HCl = KCl+H2O
已知θ是第四象限角,且sin(θ+ π4 )= 35 ,则tan(θ﹣ π4 )=____.
与“绵绵春雨润万物”构成对偶且意境最和谐的一项是( )