A:一定条件下,Cl2可在甲苯的苯环或侧链上发生取代反应
B:乙烷和丙烯的物质的量共1mol,完全燃烧生成3molH2O
C:1mol甲醛与足量的新制银氨溶液反应,生成2mol银
D:光照下2,2—二甲基丙烷与Br2反应其一溴取代物只有一种
This is my classmate. She's a girl. Her name is Jane. She's twelve years old. She's thin and tall. She has long and black hair. She has two big eyes and a small nose. She has a skirt. It's red. She has a pair of trousers, too. They are red. But her skirt is old. She wants to buy a new skirt. Look, what can she do? Oh, she can skip a rope. This is her rope. It's long. It's blue.
唐太宗曾将一位公主嫁到吐蕃,加强了汉藏两族之间的友好关系,这位公主是( )