对匀质材料的等截面平面弯曲变形梁，梁内最大剪力的作用面上弯矩必为零；
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对匀质材料的等截面平面弯曲变形梁，矩形截面的梁横截面上最大正应力的点处切应力必为零
A. 对
B. 错
最大弯矩截面最大拉应力等于最大压应力的条件是截面形状对称于中性轴
A. 对
B. 错
EI是梁的抗弯刚度，提高它的最有效、最合理的方法是采用惯性矩大的截面形状
A. 对
B. 错
In addition to working a full day at his ______ , he has to take care of his family.
A. charge
B. company
C. career
D. cash
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