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
Class is over. Let’s stop______ a rest.
A.having
B.to have
C.had
D.have
肺部疾病中,临床上常见伴咯血的疾病是()
A.肺梗塞
B.肺结核
C.肺炎
D.肺脓肿
E.恶性肿瘤肺转移