B型(brightness mode)显示与超声束径向一致的切面回声图像,界面回声强弱由明暗度(灰阶)表示,它属
B型(brightness mode)显示与超声束径向一致的切面回声图像,界面回声强弱由明暗度(灰阶)表示,它属于亮度调制型的二维图像。反射__________________显示亮信号,反射__________________则暗。
B型(brightness mode)显示与超声束径向一致的切面回声图像,界面回声强弱由明暗度(灰阶)表示,它属于亮度调制型的二维图像。反射__________________显示亮信号,反射__________________则暗。
A、Once More to the Lake
B、Walden
C、American Scholar
D、Nature
Covering preceding mode by land and last mode by sea including inland, the MMTD is issued in:
(1)( ) negotiable transport document (usually in the form of B/L).
(2)( ) non-negotiable transport document.
A.Tenor
B.Register
C.Mode
D.Field
A.A. book space
B.B. choose the mode of transport
C.C. arrange for customs clearance
D.D. weight and measure the goods