若C1/C2比值点落在油区底部,而C1/C4比值点落在气区顶部,则该层可能为()。
A. 油水同层
B. 含气油层
C. 非生产层
D. 高产气层
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已知等高线间距h=10m,最大限制坡度τ=50%,则路线通过相邻等高线的最短距离是0.5m。
A. 正确
B. 错误
墙砖的水平灰缝厚度和竖向灰缝宽度宜为10mm,但不应小于(),也不应大于12mm。
A. 8mm
B. 6mm
C. 5mm
D. 3mm
You want to migrate your database to ASM, so you have done a clean shutdown, made a closed backup of the entire You wa database, noted the location of your control files and online redo log files, and changed your spfile to use OMF. The last step is to run an RMAN script to do the conversion. Using the following steps,what is the correct order in which the following RMAN commands should be executed?() 1. STARTUP NOMOUNT 2. ALTER DATABASE OPEN RESETLOGS 3. SQL "ALTER DATABASE RENAME ,,logfile1 path TO ,,+dgrp4 ,," # plus all other logfiles 4. SWITCH DATABASE TO COPY 5. BACKUP AS COPY DATABASE FORMAT ,,+dgrp4 6. ALTER DATABASE MOUNT 7. RESTORE CONTROLFILE FROM ,,controlfile_location
A. 2, 5, 3, 1, 7, 6, 4
B. 1, 7, 6, 5, 4, 3, 2
C. 5, 1, 2, 7, 4, 6, 3
D. 7, 3, 1, 5, 6, 2, 4
假丝酵母属能形成()。
A. 菌丝体
B. 菌丝体和长芽细胞
C. 菌丝体、长芽细胞和子囊孢子