love(zxy,wf). love(zxy,zhm). love(wf,xtf). love(zhm,zxy). love(xtf,wf). love(xtf,zhm). love(ldh,zhm). lovers(X,Y):-love(X,Y),love(Y,X). 写出下列答案 (1) ?love(zxy,ldh).(2) ?love(zxy,X).（3) ？ lovers(X,Y).

(1) false. 因为没有规定zxy和ldh之间是否有爱情关系。
(2) X = wf; X = zhm. 因为zxy爱wf和zhm。
(3) X = zxy, Y = wf; X = wf, Y = xtf; X = zhm, Y = zxy; X = xtf, Y = wf; X = zhm, Y = xtf; X = zhm, Y = ldh。因为符合lovers谓词的条件是两个人之间相互有爱情关系，所以可以得到以上六组解。

相关问题

[ERROR] [1685008813.764906491]: Cannot identify '/dev/video0': 2, No such file or directory [usb_cam-2] process has died [pid 3201, exit code 1, cmd /opt/ros/melodic/lib/usb_cam/usb_cam_node __name:=usb_cam __log:=/home/zxy/.ros/log/f0ecf8e8-fae2-11ed-96ca-000c298795f5/usb_cam-2.log]. log file: /home/zxy/.ros/log/f0ecf8e8-fae2-11ed-96ca-000c298795f5/usb_cam-2*.log

这个错误提示是在ROS机器人操作系统中使用USB摄像头时出现的。错误提示是找不到/dev/video0这个文件，这可能是因为你的电脑中没有连接摄像头，或者是连接的摄像头没有被正确识别。你可以尝试重新连接摄像头，或者检查一下摄像头是否被正确识别。如果问题仍然存在，你可以尝试在终端中运行以下命令来查看摄像头是否被正确识别：

ls -l /dev/video*

如果摄像头被正确识别，你应该可以看到/dev/video0这个文件。如果还有其他错误信息，请查看ROS的日志文件，以获取更多信息。

Invalid bound statement (not found): com.zxy.easyexcel.mapper.InformationMapper.search

As an AI language model, I am not able to determine the exact cause of the error without additional information about the code and the context in which it is being used. However, based on the error message you provided, it appears that the code is attempting to reference a bound statement that cannot be found. This could be due to a variety of reasons, such as a misspelled or incorrectly formatted statement, a missing import or dependency, or an issue with the configuration of the mapper or the database connection. To resolve the issue, you may need to review the code and the configuration settings to identify and correct any errors or omissions. Additionally, you may want to consult the documentation or seek assistance from a developer or technical support team to help you troubleshoot the problem.