SwitchCentre日志分为哪几类？（）
A.H323日志
B.Switch日志
C.监控日志
D.System日志
参考答案：A, D
The number of the students in our school now _____ that of ten years ago. Which of the following is wrong? [ ]
A. has doubled
B. is double
C. is twice as large as
D. is twice as much as
男性，18岁，诊断特发性血小板减少性紫癜，查血小板15×109/L。
该患者首选的治疗是（）
A.输新鲜血
B.糖皮质激素
C.脾切除
D.免疫抑制剂
E.中西医结合治疗
