可不进行施工招标的情形有（）。 采购人依法能够自行建设的项目。 需要采用不可替代的专利技术的项目。 关系公众安全的项目。 使用外国政府贷款的项目。 需要向原中标人采购工程，否则将影响施工或者功能配套要求的项目。
A MySQL replication slave is set up as follows: User all InnoDB tables Receives ROW-based binary logs Has the read-only option The replication slave has been found in an error state. You check the MySQL error log file and find the following entries: 2013-08-27 13:55:44 9056 [ERROR] Slave SQL: Could not execute Write_rows event on table test.tl; Duplicate entry ‘3’ for key’PRIMARY’ , Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event’s master log 56_master-bin.000003, end_log_pas 653, Error_code: 1062 2013-08-27 13:55:44 9056 [Warning] Salve: Duplicate entry ‘3’ for key ‘PRIMARY’ Error_code: 1062 2013-08-27 13:55:44 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with “SLAVE START”, We stopped at log ‘56_masterbin.000003’ position 496 What are two possible causes for this error to occur?（） The slave was created with mysqldump –u root –p – skip-lock-table—all-databases > /data/data.sql。 The slave user does have INSERT, UPDATE, or DELETE permission and cannot execute the write_rows function。 For tables with UNIQUE keys, statement-based replication must be used maintain integrity。 The root user on the slave has executed FLUSH LOGS, causing the relay-log to doublewrite。 The applications have the SUPER privilege, which allows them to update row。
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Evaluate the SQL statement: SELECT LPAD (salary,10,*) FROM EMP WHERE EMP _ ID = 1001; If the employee with the EMP_ID 1001 has a salary of 17000, what is displayed?（） 17000.00。 17000*****。 ****170.00。 **17000.00。 an error statement。
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变压器的短路损耗主要为（）。
