常用的抗痉挛药物有下列（）。
A.巴氯芬
B.硝苯呋海因
C.地西泮
D.替扎尼定
E.安定
参考答案：A, B, C, D
My father and my mother have been married for 30 years, and never once ______ with each other.
A．they have quarrelled
B．did they quarrel
C．had they quarrelled
D．have they quarrelled
施工升降机防坠安全器必须送到法定单位去进行检验，出厂检验报告应写明测量的标定（）
A.动作速度
B.制动距离
C.外观清洁情况
D.试验载荷
E.安全开关的动作情况
