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【简答题】
一外伸所示，梁上受集中力作用。已知a=25cm，l=100cm，12.6号工字钢制成，材料的弯曲应力[σ]=170MPa，剪应力[τ]=100MPa，试求此梁的许可荷载[F]。
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举一反三
【简答题】They fell in love with each other ______ the first sight.
【单选题】They fell in love with each other ______.
A.
at a time
B.
at one time
C.
at times
D.
at time
【单选题】They fell in love ______they saw each other
A.
the first time
B.
for the first time
C.
in the first time
D.
at the first time
【简答题】They fell in love at first sight. But they paid for it by losing their consistent hunger for knowledge.
【简答题】They fell in love the moment they saw each other for the first time.
【简答题】当级配碎石用做高速公路和一级公路的基层以及半刚性路面的中间层时,其最大粒径宜控制在( )以下A. 31.5 B. 26.5 C. 37.5
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