A:①②
B:②③
C:②④
D:③④
节日期间的商场里顾客很多,有人会感觉到闷热缺氧,测定出氧气的体积分数可能是( )
______ of the teachers in our school is 118 and _____ of them are women teachers.
读下图,图示地震与两大板块的挤压有关,下列避震方法,正确的是( )
①在家里,可躲在床、桌子下
②在影剧院,应奋力挤出剧院,不畏践踏快速跑到室外
③在教室里,可躲在书桌下或墙角处
④在室外要远离高层建筑、烟囱、桥梁等