下图反映的是长征途中红军战士在
A．爬雪山
B．过草地
C．飞夺泸定桥
D．渡赤水河
答案：B
There _____________ a teacher and some students in the classroom.[ ]
A. are
B. is
C. am
A．125.255.255.255
B．111.111.111.111
C．222.222.222.222
D．255.255.255.255
