A single vessel being towed alongside shall exhibit（）.
A. one all-round white light
B. sidelights and a stern light
C. only the outboard sidelight and a stern light
D. a masthead light，sidelights，and a stern light
匈奴人由于其游牧的生活方式决定了战斗力要强于中原地区的农耕文明下的兵士。
A. 正确
B. 错误
A heated bulkhead has the effect on a hygroscopic commodity of（）.
A. causing moisture to accumulate against bulkhead
B. lowering the vapor pressure of the commodity
C. lowering the dew point of the air
D. raising the vapor pressure of the commodity
企业在安全生产许可证有效期内未发生死亡事故的，其安全生产许可证自动延期。
A. 正确
B. 错误
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