A preson who sees someone fall overboard should().
A. call for help and keep the individual in sight
B. run to the radio room to send an emergency message
C. immediately jump in the water to assist the individual
D. go to the bridge for the
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直线趋势延伸预测模型参数对时间序列资料采取的原则是()。
A. 同等对待
B. 区别对待
C. 重远轻近
D. 重近轻远
试压温度计应安装在无阳光照射的地方,否则应采取遮阳措施;每段试压管线安装的温度计不应少于()支,管线两端应各安装()支。