钢筋混凝土或预应力混凝土简支梁桥属于()。
A.静定结构
B.超静定结构
C.连续结构
D.排架结构
参考答案:A
You are Paul. July 25 is your friend Ann’s 20th birthday. Write her a letter of congratulations. Marks will be awarded for content, organization, grammar and appropriateness.
胸痹虚证主要责之哪些脏腑的亏虚()
A.心肾
B.心脾肺
C.心肝肾
D.心脾肝肾
E.心脾肾