已知轴两端作用外力偶转向相反、大小相等,如图示,其值为T。则该轴离开两端较远处横截面上剪应力的正确分布图是:()
A.图A.
B.图B.
C.图C.
D.图D.
参考答案:A
While listening to light music, _____.
A She felt asleep B. The light went out
C Someone knocked at the door D. and she can’t help laughing
想了解中国17世纪的手工业技术的情况,你首选的资料是[ ]
A.《齐民要术》
B.《本草纲目》
C.《农政全书》
D.《天工开物》