下列哪项是超声引导下囊肿无水乙醇治疗的并发症:①出血;②感染;③腹膜炎;④醉酒()。
A.①②③
B.①③
C.②④
D.④
E.①②③④
参考答案:E
电梯应当至少每()日进行一次日常维护保养。
A、10
B、15
C、25
D、30
— My cat's really fat.
— You _____ have given her so much food. [ ]
A. wouldn't
B. couldn't
C. shouldn't
D. mustn't