A、 信息
B、 警告
C、 命令
D、 建议
答案:C
A、 信息
B、 警告
C、 命令
D、 建议
答案:C
A. 5个/7个
B. 5个/9个
C. 6个/9个
D. 7个/9个
A. C
B. A
C. L
D. H
A. 防排水系统
B. 桥面铺装
C. 桥梁支座系统
D. 伸缩缝
E. 挖井或桩基
A. Instruction: The recipient has to follow this message unless there is contradictory safety reasons which have to be reported to the sender.
B. Advice: The decision whether to follow it stays with the recipient, but one should consider it very carefully.
C. Warning: The recipient of a warning should pay immediate attention to the danger mentioned. Consequences of a warning will be up to the sender.
D. Information: Consequences of an information will be up to the recipient.
A. LA50
B. LB50
C. LC50
D. LD50
A. 红色
B. 橙色
C. 黄色
D. 绿色
A. ①②④
B. ②③④
C. ①②③
D. ①②③④
A. 每季度
B. 每年
C. 每月
D. 每两年
A. 船舶代理
B. 船长
C. 船东
D. 货主
A. 38-42
B. 36-38
C. 42-44
D. 34-36