I don't think he ______ here next week. [ ]
A. comes
B. came
C. will come
D. coming
答案:C
悬臂梁在均布荷载作用下,在固定端根部处的剪力和弯矩为()
A.剪力为零、弯矩最大
B.剪力最大、弯矩为零
C.剪力为零、弯矩为零
D.剪力最大、弯矩最大
如果不用腰脊带头会有什么后果?