A:德国承认并尊重奥地利的独立
B:德国的全部海外殖民地由英、法、日等国瓜分
C:在10天之内把苏台德区割让给德国
D:遵守各国在中国的“门户开放”、“机会均等”原则
–Mummy, the toy advertised on TV is really fantastic. Will you buy me one?
--OK. You __________ have one if you behave well.
关于凸透镜的说法正确的是( )