1957年工农业总产值达到1241亿元，按可比价格计算，比1952年增长67．8%；其中，农业总产值537亿元，增长24．8%，所占比重由1952年的56．9%下降为43．3%；工业总产值704亿元，增长128．6%，所占比重由1952年的43．1%上升到56．7%。这种状况表明（    ）

小军朗读课文时声音太小，离他较远的同学听不清楚，老师请他声音再大一点．这里的“声音大一点”指的是声音的（　　）

In order to safeguard（保证）the education of all Hope Chinese Scholl（HCS）students and the normal running of the school, the following rules should be followed:
★ Be quiet in classroom and hallways. Do not run or shout in classrooms or hallways.
★ Do not drink or eat in classrooms or hallways.
★ Stay in the school during school time as well as rest time. Do not leave the school or play out of the school area during school time. This includes rest time.
★ Do not scribble on any desks or walls.
★ Be respectful（尊敬）to teachers and parents.
★ Help teachers and other students to keep the classroom clean. Do not move desks, chairs, and other furniture in the classroom without the teacher's instructions.

△ABC中，∠C＝90°，点O为△ABC三条角平分线的交点，OD⊥BC于D，OE⊥AC于E，OF⊥AB于F，且AB＝10cm，BC＝8cm，AC＝6cm，则点O到三边AB、AC、BC的距离为（　　）.