下列哪种单盘做业务盘时，可以应用到两个SYS口（）
A. ESJ1
B. E1J1
C. S1J1
D. GSJ1
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A passenger vessel is underway. When may passengers visit the pilothouse? （）
A. Passengers are excluded from the pilothouse while underway
B. Passengers are permitted in the pilothouse during daylight hours only
C. Passengers are permitted to visit the pilothouse when authorized by the Master and officer of the watch
D. Passengers are permitted in the pilothouse when they are escorted by a ship's officer
车辆运行安全监控系统（5T系统）由TPDS、TADS、TFDS、THDS、TVDS组成。
A. 正确
B. 错误
在地道救了阿拉丁的是（）。
A. 戒指的仆从
B. 神灯的仆从
C. 魔法师
小企业在销售商品时如提供有商业折扣的，在确认收入时应将商业折扣的部分扣除。
A. 正确
B. 错误
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