学生以（）方式参加科研项目时，既容易完成，又能够锻炼独立工作能力。
A. 自己设立项目自主研究
B. 做导师的科研助手
C. 独立承担科研项目中的一定环节或一部分
D. 直接负责科研项目
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The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.
A. immediately when the contact is noted on radar
B. only if the radar scope is watched constantly
C. after the contact has been marked at least twice
D. by an occasional glance at the radar
You are the network administrator for TestKing.com. A Windows Server 2003 computer named TestKing6 functions as a file server. Drive C on TestKing6 is running low on free disk space. You need to ensure that an event is written to the application log on Drive C when 10 percent of the available free space on the server remains. What should you do?（）
A. Open Event Viewer and expand the application log. Select New Log View.
B. Open Computer Management and expand Storage. Right-click Disk Management, and then select Rescan Disks.
C. Open Performance and expand Performance Logs and Alerts. Right-click Counter Logs, and then select New Log Settings.
D. Open Performance and expand Performance Logs and Alerts. Right-click Alerts, and then select New Alert Settings.
抵押人以依法承包并经发包方同意抵押的荒地的土地使用权不能作为抵押物。
A. 正确
B. 错误
宋哲宗元祐元年（1086年）监察御史王若叟在一道奏疏中向皇帝进言说：“富民召客为佃户，每岁未收货间，贷賙（zhou，接济）给．无所不至，一失抚存，明年必去而之他。”这段材料说明（）
A. 地主注意改善与佃户间的关系
B. 地主放弃了对佃户的控制
C. 租佃成为主要的经营方式
D. 地主与佃户开始相互依存
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