下列引起胸痛的胸壁疾病是（）
A.肺癌
B.肋间神经炎
C.自发性气胸
D.胸膜肿瘤
E.胸膜炎
参考答案：B
A series of debates between the major candidates ____ scheduled last week. [ ]
A. is
B. are
C. was
D. were
我国现行规范中，热轧钢筋按其力学性能，分为I级、II级、III级、IV级，其牌号分别为（）
A.Q235、RL335、RL400、RL540
B.HPB235、HRB335、HRB400、HRB540
C.HPB235、HRB33、HRB400、HRB500
D.Q235、RL335、RL400、RL500
