A.n-1
B.n
C.n+1
D.2n
E.2n+1
[单选题]当圆半径增加n时,圆的周长增加一倍,那么原来圆的半径是()。A.n-1B.nC.n+1D.2nE.2n+1
[单选题]圆截面悬臂梁,若其它条件不变,而直径增加一倍,则其最大正应力是原来的()倍。A .1/8B .8C .2D .1/2
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16
[单选题]当圆截面梁的直径增加一倍时,梁的强度为原梁的______倍,梁的刚度为原梁的______倍。( )A.16,16B.8,8C.16,8D.8,16