干出礁高度是从理论深度基准面向上量至礁石顶部。
参考答案：对
Everyone except Tom and John ________ there when the class began.
A．are
B． is
C． were
D． was
《希波克拉底誓言》中提出的医德根本原则是（）
A.为病家谋利益
B.不为妇人施堕胎手术
C.保守医密
D.平等对待患者
E.不伤害患者
