What is the usual anchor handling device where one machine may be used to handle both anchors?
A、The windlass.
B、The crane.
C、The mooring winch.
D、The cargo winch.

单项选择题How's the young man? A. He's twenty. B. He's a doctor. C. He's much better. D. He's David.

单项选择题氢氯噻嗪降血压的短期机制是 A、抑制醛固酮分泌 B、排钠，使细胞内钠离子减少 C、降低血浆肾素活性 D、排钠利尿，造成体内钠离子和水的负平衡，使细胞外液和血容量减少