垃圾中转站应重点消杀，防止蚊蝇孳生，消杀频次参照《（）管理标准》执行。
A.清洁
B.消杀
C.绿化
D.以上三项都是
参考答案：D
At the beginning of a speech, it is very important to grab the audience's attention and make them interested in ____ you have to say．
A．what
B．which
C．that
D．who
肝破裂( )
A．以内出血为主要症状B．以化学性腹膜炎为主要症状C．以细菌性腹膜炎为主要症状D．内出血和腹膜刺激征均明显E．以内出血和腰背痛为主要症状
