弯沉值检验时，弯沉仪由贝克曼梁、百分表及表架组成，贝克曼梁由合金铝制成，长度比为（）。 ["1：1","2：1","3：1","4：1"]
You have the following requirements in relation to the detection of block corruption for your database instance： Check for logical self-consistency of data blocks when modified in memory. Checksums are calculated before and after the block change. Checks are performed for the lost writes to the physical standby database. Which method would help you perform the above checks automatically？（） [" Set the DB_SECUREFILE parameter to PERMITTED"," Set the DB_ULTRA_SAFE parameter to DATA_ONLY"," Set the DB_LOCK_CHECKSUM parameter to TYPICAL"," Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL"]
普通热轧带肋钢筋的牌号分别是（）。 ["HPB300","HRB300","HRB335","HRB400"]
You create a package that contains PL/SQL variables that must be shared among several forms in the Travel application. You place the package in a library and attach the library to all the forms that need to share the data. Which parameter in the OPEN_FORM built-in must you set to ensure that changes made by one form are visible to the other forms in the application?（） ["data_mode ","paramlist ","query_mode ","session_mode&e"]
简述平衡训练的基本原则。
试述专营权管理的特点及其优点？
