Amy and Sarah ______________ chess. [ ]
A. is playing
B. is play
C. are playing
答案:C
产妇在胎盘娩出前禁止使用的药物是
A.麦角新碱注射液
B.乳糖酸红霉素注射液
C.头孢唑啉钠注射液
D.5%葡萄糖注射液
E.氨甲苯酸注射液
球员对司线的判决不满,小声谩骂,这时司线员听到后,应该()
A.不予理睬
B.当场质问
C.向主裁报告
D.请裁判长