试题详情

Most of the practical work of the government is done by _____.

The ratio of the work done by the machine ______ the work done on it is called the efficiency of the

_____ is the process of removing heat, and the practical application is to produce or maintain temp

The small intestine does most of the work of chemical digestion via enzymes secreted by the _______

the principle of _____, the Federal Government is divided into three branches，the legislative，the