Why not ______ exercise more? [ ]
A. to try
B. try to
C. trying to
答案:B
常用的热轧带肋钢筋级别为Ⅱ级,牌号主要有(),
A.HRB300
B.HRB335
C.HRB400
D.HRB435
E.HRB500
张热常见的疾病是
A.伤寒
B.肺炎
C.支气管炎
D.败血症
E.布鲁菌病