Which of the routine maintenance procedures listed is required for starting air receivers?()
A. over-speeding
B. overload
C. low exhaust temperature
D. high crankcase pressure
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下面哪一种定价策略适用于一些知名度高、具有较大的市场影响、深受市场欢迎的驰名商标的电信产品。()
A. 整数定价
B. 尾数定价
C. 声望定价
D. 招徕定价
自救器是一种小型的供矿工随身携带的防毒器具。是矿工在井下遇到()、瓦斯或煤尘爆炸等灾害事故时进行自救的一种重要装备。
云梦秦简《金布律》记载:“官府受钱者,千钱一畚(计量容器),以丞、令印印„„钱善不善,杂实之„„百姓市用钱,美恶杂之,勿敢异。”这主要反映了秦朝的半两钱()
A. 铸造精细、样式精美
B. 由各级政府来维护流通信誉
C. 由各地政府掌握钱币铸造权
D. 流通广泛、币制统一
View the Exhibit.You executed the following command to perform a backup of the USERS tablespace: RMAN> BACKUP TABLESPACE USERS; Which three types of files are backed up? ()
A. all the data files belonging to the USERS tablespace
B. password file
C. online redo log files
D. the current control file
E. archived redo log files
F. the current server parameter file
G. data files belonging to the USERS tablespace and all the default tablespace