问题
单项选择题
带悬臂的单跨简支梁如图3-129所示，B支座的反力(向上为正，向下为负)，是下述哪一个数值（）
A.18.0kN
B.14.67kN
C.-2.0kN
D.-5.33kN
答案
参考答案：B
解析：
由题，有∑MA=0，
即 
，
解得RB=14.67kN。
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带悬臂的单跨简支梁如图3-129所示，B支座的反力(向上为正，向下为负)，是下述哪一个数值（）
A.18.0kN
B.14.67kN
C.-2.0kN
D.-5.33kN
参考答案：B
解析：
由题，有∑MA=0，
即 ，
解得RB=14.67kN。
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| Kim and Manuel are talking about the year 2050. "What will our world be 1 in the year 2050?"asks Kim. "I have no idea,"says Manuel." What do you 2 ?" "Well, 3 knows, but it's 4 to guess." "In the year 2050 everyone will carry a pocket computer. The computer will give us nearly all the answers 5 the problems. We shall all have 6 in our pockets, too. " "A lot of people will live and work 7 the sea, too. " " 8 will do most of the work, 9 so many people will have more 10 . Perhaps they will work only two or three days a week. " | ||||
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