在油脂中常用的三种抗氧化剂()、()、()。
参考答案:(PG)、(BHT)、(TBHQ)或(BHA)
Bob has a friend who _____ the piano very well. [ ]
A. play
B. playing
C. plays
D. played
巨大卵巢肿瘤摘除后应注意()
A.左心衰
B.诱发急性肺水肿
C.血压骤降
D.心率增快
E.以上均可发生