带式输送机是用连续运行的无端输送带作为（）输送货物的机械
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转向架与车体的（）载荷能引起轮对一侧减载而造成脱轨事故。
关于地层伤害评定，下列说法正确的是（）。
A. 流动效率越大，地层伤害越严重
B. 表皮系数越大，地层伤害越严重
C. 附加压降越大，地层伤害越严重
D. 产率比越大，地层伤害越严重
The 10-cm radar as compared to a 3-cm radar of similar specifications will（）.
A. be more suitable for river and harbor navigation
B. provide better range performance on low lying targets during good weather and calm seas
C. have a wider horizontal beam width
D. have more sea return during rough sea conditio
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