题目

BERLIN---A German woman, fearful that a burglar was trying to break into her second -storey apartment, called police after she heard someone climbing up to her balcony shortly after midnight, police said Thursday. Police discovered the “burglar” was a man carrying flowers and a bottle of wine who turned out to be the woman's boyfriend. But then arrested him on an outstanding reason.  “He was trying to surprise her with the flowers and a bottle of wine but it all went wrong,” said Korbach police spokesman Volker Koenig. He said the man jumped down from the balcony and tried to新物种形成的标志是 A．具有新的生理功能                      B．出现新的形态结构 C．出现地理隔离                             D．形成生殖隔离