[多项选择]患儿，男性，5岁，要求矫治前牙反牙合。直面型，乳前牙反牙合。乳牙列完整。如果乳牙反是骨性的，则可能是下列哪部分生长发育异常所致（） A. 颅底软骨过早骨化 B. 额颌缝处成骨不足 C. 颧颌缝处成骨不足 D. 下颌骨髁突软骨提前钙化 E. 颧颞缝处成骨不足 F. 上颌结节后壁区新骨沉积不足
[填空题] Traditional Americans think marriage is a serious business. It begins with (36)______. A young man asks the father of his sweetheart for (37)______to marry his daughter. If the father agrees, the man later (38)______ to her. The man usually. gives his fiancé a (39)______ring as a (40)______of their engagement.
Although most weddings follow long-held traditions, there’’s still room for American (41)______. For example, the usual place for a wedding is in a (42)______. But some people get married outdoors in a scenic spot. The (43)______may invite hundreds of people or just a few close friends. But some things rarely change. (44)____________.
As the ceremony begins, the groom and his attendants stand with the minister, facing the congregation. (45)____________. They give each other a gold ring to symbolize their marriage commitment.
At the wedding reception, the bride and groom greet their guests. (46)____________. Tradition says that the one who catches the bouqu
