11-2=____   13-5=____   24-8=____ 41-6=____    4+55=____

30+70= ____   90-60=____ 74-70=____ 53-3=____  25+5-8=____

 9+3-6=____ 18-3-9= ____45-(12+8)=____ 60-(12-7)=____ 40+(15+6)=____

对光完成的标志是要看到明亮的圆形视野．（判断对错）

The idea ____(打动；撞击) a mixture of fear and excitement into people's hearts.