阿托品分子中含有什么结构,易发Vitali反应
A.托品酸B.莨菪醇C.碱性氮原子D.酯键E.酰胺键
参考答案:A
在△ABC中,高AD和BE交于H点,且BH=AC,则∠ABC=______.
Everyone knows that China is famous __________ the Great Wall in the world.[ ]
A. of
B. for
C. with
D. on