负责航行值班值班的驾驶员的职责包括做好与航行安全有关的动态和工作的正规的记录，这些记录包括（）
A. 气象要素应每班记录一次
B. 主机转速应每班记录一次
C. 台风来袭时，气象应每小时记录一次
D. C均正确
最常见的食品生物性污染是（）。
A. 细菌性污染
B. 细菌和细菌毒素性污染
C. 真菌性污染
D. 真菌性和真菌毒素污染
ABC公司2010年的经营杠杆系数为3，产销量的计划增长率为10%，假定其他因素不变，则该年普通股每股息税前利润增长率为（）。
A. 30%
B. 25%
C. 20%
D. 10%
Your company has a server named Printer1 that runs Windows Server 2008 R2. Printer1 has the Print and Document Services server role installed.You need to reduce the number of events registered in the system log on Printer1. What should you do?（）
A. Open the Event Viewer console. Create a custom view for the system log. Exclude the events that are notified by Event ID 10 from the filter.
B. Open the Print Management console. Open the properties of Printer1 and clear the Log spooler information events option.
C. Open the Print Management console. Open the properties of Printer1 and clear the Show informational notifications for network printers option.
D. Open the Print Management console. Open the properties of each individual printer on Printer1 and clear the Enable advanced printing features option.
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