题目内容

机床的传动链误差对于()的精度影响很多大。

A. 滚齿
B. 磨外圆
C. 拉花键
D. 车端面

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随着市场经济的日趋成熟和知识经济的不断发展,饭店中间商的发展将呈现()趋势。

A. 渠道结构扁平化
B. 渠道终端个性化
C. 渠道实现方式网络化
D. 渠道促销策略大众化
E. 渠道成员关系紧密化

债券是发行人筹措资金的重要手段,投资债券的投资者与发行人之间是债权债务关系。

A. 正确
B. 错误

日常生产检查的特点是要求以()把操作结果真实反馈给操作者,以便及时调整操作。

Flashback Database is enabled in your Oracle 10g database. One of your database users erroneously purged an important table residing in his schema. The table was purged sometime between 10:00 P.M. and 10:30 P.M. The next day, you decide to flash back the database. Before you flash back the database, you want to ensure that you have all the necessary flashback data. Which dynamic performance view must you use to determine whether you have the required flashback data to recover the purged table?()

A. V$DATABASE
B. V$UNDOSTAT
C. V$FLASHBACK_DATABASE_LOG
D. V$FLASHBACK_DATABASE_STAT

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