【简答题】[A] asserting [B] alleging [C] maintaining [D] testifying
【简答题】A.getting B.meeting C.supporting D.maintaining
【简答题】__________ [A] retaining [B] attaining [C] maintaining [D] gaining
【单选题】外出季节性较弱、对价格较为敏感、选择自由度较差指的是( )。
【单选题】过共析钢奥氏体化正确的加热临界点是( )
【单选题】β受体阻断药物对下列心律失常疗效最好的是()