在△ABC中, ∠ABC=∠C=2∠A,BD是∠ABC的平分线,DE∥BC,则图中等腰三角形的个数是( )
In order to stay healthy, people pay more attention to their _______.
有学者把18世纪西方社会政治、经济领域出现的重大变革称为“二元革命”。下列现象属于“二元革命”的是
Mum is ill. I have to ______ her at home