The wealth of a country should be measured ________ the health and happiness of its people as well as the material goods it can produce.
B
暂无解析
光的相干条件是光矢量振动的()
恋爱是缔结婚姻、组成家庭的前提和基础
Thetheoryofblackholesinspace__(accept)bymanyseriousscientistsandastronomers.
1mol单原子分子理想气体的温度从0℃升高到100℃，气体的热力学能增加了（）
静电场中某点的电势等于（）
