— Is there _____ in this magazine?
— I don't know.
A:something interesting
B:interesting something
C:anything interesting
D:interesting anything
下列图示的中国古代发明的制作过程涉及到化学变化的是( )
A粮食酿醋
B.打磨铜镜
C.丝线织绸
D.钻井取卤
下列命题:①在△ABC中,若A>B,则sinA>sinB;②已知AB→=3,4,CD→=-2,-1,则AB→在CD→上的投影为-2;③已知P:∃x∈R,cosx=1,q:∀x∈R,x2-x+1>0,则“p∧¬q”为假命题.其中真命题的个数为( )