戊二醛属灭菌剂，常用灭菌浓度和对医疗器械浸泡灭菌需要的时间分别为（）
A. 1%；8h
B. 2%；10h
C. 3%；5h
D. 0.5%；6h
查看答案
货车装用KZW-A空重车自动调整装置，可减少混编列车制动时车辆间纵向冲击力。
A. 正确
B. 错误
Which statement is true about a worm attack？（）
A. Human interaction is required to facilitate the spread.
B. The worm executes arbitrary code and installs copies of itself in the memory of the infected computer.
C. Extremely large volumes of requests are sent over a network or over the Internet.
Data or commands are injected into an existing stream of data. That stream is passed between a client and server application.
国家税务总局自财政部批复部门预算之日起（）日内，批复下一级预算。
A. 10
B. 7
C. 5
D. 15
集装箱拼箱货物运抵目的地后，承运人应在（）内向收货人发出到货通知。
A. 2小时
B. 6小时
C. 12小时
D. 24小时
微信支付 
支付宝支付