A: +Cl2 →光照 +HCl
B:CH2=CH2+Br2→CH2BrCH2Br
C:ClCH2CH═CH2+NaOH →ΔH2O HOCH2CH═CH2+NaCl
D: +HO﹣NO2 →Δ浓硫酸 +H2O
点A(-5,-6)与点B(5,-6)关于____对称.
小明在同学的生日晚会上送给同学一件生日礼物,可没想到竟是一件假冒伪劣商品,小明恼羞成怒,扬言要找店主“算帐”。你认为小明最好( )
Before entering the room,I was asked to show the soldier the________ of my suitcase.