大量胸腔积液()
A.皮下气肿
B.胸骨压痛
C.吸气时肋间隙回缩
D.上腔静脉阻塞
E.肋间隙膨隆
参考答案:E
— My watch has been losing time for the past week.
— It probably needs ______. [ ]
A. clean
B. cleaned
C. to clean
D. cleaning
根据《联合国海洋法公约》规定()深度是切断大陆架的标准。
A.2500米
B.2940米
C.200海里
D.12海里