依据《海牙规则》的规定，下列有关承运人适航义务的表述中哪个是错误的？（）
A. 承运人应在整个航程中使船舶处于适航状态
B. 承运人应在开航前与开航时谨慎处理使船舶处于适航状态
C. 承运人应适当地配备船员、的设备和船舶供应品
D. 承运人应使货舱、的冷藏舱和该船其他运载货物的部位适宜并能安全地收受、的运送和保管货物
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A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment? （）
A. If the quadrantal spheres are out as far as possible replace them with smaller spheres
B. If the quadrantal spheres are in as far as possible remove one of the spheres
C. If the quadrantal spheres are in as far as possible replace them with smaller spheres
D. If the quadrantal spheres are out as far as possible，move the quadrantal spheres i
下列哪项属于贷款类凭证（）
A. 借据
B. 汇票
C. 空白银行卡
D. 存折
BA系统主要由哪几部分组成？（）
A. 监控站
B. 管理中心
C. 通信网络
D. 电脑
E. 传感器和执行器
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