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【单选题】
螺旋桨产生的沉深横向力与“沉深比”h／D有关：（）.
A.
h／D越大，沉深横向力越大
B.
h／D越大，沉深横向力越小
C.
h／D越小，沉深横向力越小
D.
h／D=0时，沉深横向力为0
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】螺旋桨推力功率THP为()。
A.
船舶主机发出的功率与传递效率的乘积
B.
螺旋桨发出的推力与螺旋桨进速(对水)的乘积
C.
螺旋業发出的推力与船速(对水)的乘积
D.
船舶阻力与船速的乘积
【单选题】Amphibious vehicles, those that can move on both land and water, have been in use for a number of years, but while most of them were fairly fast on land, they moved quite slowly when they were functio...
A.
the sidewall ACV
B.
Mountbatten Class hovercraft
C.
Cockerell’s ACV
D.
Sedam N500
【单选题】Amphibious vehicles, those that can move on both land and water, have been in use for a number of years, but while most of them were fairly fast on land, they moved quite slowly when they were functio...
A.
are moved forward by propellers
B.
travel on a cushion of air
C.
are lifted up by a flexible rubber "skirt"
D.
move faster on land than on water
【单选题】伴流横向力主要是由于__。
A.
船速较大,伴流流畅在螺旋桨处的分布上大下小的原因造成的
B.
船速较大,伴流流畅在螺旋桨处的分布上小下大的原因造成的
C.
船速较小,伴流流畅在螺旋桨处的分布上大下小的原因造成的
D.
船速较小,伴流流畅在螺旋桨处的分布上小下大的原因造成的