关于证书说明准确的是
A、证书由第三方CA认证中心发放C
暂无解析
Eachstudentistogiveashort___(speak)totherestoftheclassattheendofthesemester.
27.1mol氦气(视为单原子分子理想气体),在温度由17℃升高到27℃的过程中保持压强不变,求气体吸收的热量、对外界做的功
Thisessayisstilltoolong.I’llhaveto___(short)itbyoneortwopages.
Thetheoryofblackholesinspace__(accept)bymanyseriousscientistsandastronomers.
Thereisanincreasing_(tend)forwomentohavechildrenlaterinlife