预应力钢筋混凝土枕轨宜选用( )。
A.Ⅰ级热轧钢筋 B.CRB550冷轧带肋钢筋C.热处理钢筋 D.乙级冷拔低碳钢筋
参考答案:C
It was April 29,2011 _______ prince William and Kate Middleton walked into the palace hall
of the wedding ceremony.[ ]
A. that
B. when
C. since
D. before
对有心、脑血管缺血性疾病的2型糖尿病患者,宜选用的磺酰脲类降糖药物为()
A.氯磺丙脲
B.格列本脲
C.格列齐特
D.格列喹酮
E.甲苯磺丁脲