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[单选] 1．如图所示钢制拉杆承受载荷，若材料的许用应力，杆件横截面积为圆形，横截面的最小半径为________。NdmJTPVQYEXJKvXu8SjREVa7veGtcAHb5lUgIUOvF0QFoPp6JiwT63cdk4u5GNNJ+mbhIQN99TCbubkQj7ZeJiwT03cdk4u5GNNJ+mbhIQN99TCbubkQj7ZeJiwT03cdk4u5GNNJ+/wHYfrADGBUZFwAAAABJRU5ErkJggg==
发布时间：2024-03-05
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a. 9.2mm
b. 84.6m
c. 9.2m
d. 84.6mm