及其承载如图 4-1 所示,假想沿截面m-m将梁截分为二。若取为研究对象,则该截面上的剪弯矩与q、M 无关;若以为研究对象,则该截面上的剪弯矩与 F 无关。( )
A.
正确
B.
错误
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【简答题】With the increase in the number of TV channels_________. A) the cost of TV advertising has decreased B) the nuiflber of TV viewers has increased C) advertisers' interest in other media has decreased D...