搜题请搜索小程序“爱下问搜题”
问题 单项选择题

影响彩色多普勒成像帧频最重要的因素是：

A． 彩色增益及深度补偿

B．滤波器的调节

C．彩色标尺的设定

D．彩色取样框的大小及深度

E． 探头的发射频率

答案

参考答案：D

单项选择题

Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when（）.

A.Vessels nearer the distress vessel acknowledge receipt

B.Vessels nearer the distress vessel fail to acknowledge receipt

C.Even you have not reveived the distress

D.Even the vessel in distress expressly prohibit you from providing any salvage service
查看答案
单项选择题

SOAP格式中，“A”代表的是（）

A.主观资料

B.客观资料

C.评估

D.计划
查看答案