— It seems that Mr. Wu is standing there.— It ______ be him because he called me from Canada just now.
A:mustn't
B:can't
C:needn't
D:shouldn't
如图,OP平分∠MON,PA⊥ON于点A,点Q是射线OM上的一个动点,若PA=2,则PQ的最小值为( )
******在中共中央政治局2月24日集体学习时强调:把培育和弘扬社会主义核心价值观作为凝魂聚气强基固本的基础工程。社会主义核心价值观 ()