对口主管部门应牵头对第三方公司信息安全工作的执行情况牵头开展审核，至少每（）组织一次检查，并将检查结果通报第三方公司。
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简述在直伸直导线中，引起纵向误差，横向误差主要来源？
Which of the following statements about authentication responses and conditions is true? （）(Choose two.)
A. When a router receives a failure response, it stops querying authentication methods.
B. When a router receives an error response, it stops querying authentication methods.
C. If the router receives a failure response from an authentication method, it queries the next method.
D. The router does not differentiate between failure and error responses; the authentication process is always interrupted.
E. If it receives no response from the authentication method, a router will determine the error condition on its own; the router also has the option to proceed to the next method in a list if configured accordingly.
如果把粮食市场看成是一个市场的话，那么它就是垄断竞争的，因为大米、面粉和玉米相互之间都是有差别的。
A. 正确
B. 错误
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