为使四冲程柴油机运转平稳，应使各个气缸的作功冲程均匀地分布在（）曲轴转角中。
A. 180°
B. 360°
C. 540°
D. 720°
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为排除煤气管道内的冷凝水，煤气管安装应具有一定的坡度，坡向可遵循下列原则是？
发热口渴，咽喉肿痛，小便黄赤，脘腹胀满，肢酸倦怠，苔黄腻，脉滑数。选方为（）
A. 三石汤
B. 甘露消毒丹
C. 白虎加苍术汤
D. 犀角地黄汤
E. 清营汤合六一散
某银行2008年年初可疑类贷款余额为600亿元，其中100亿元在2008年年末成为损失类贷款。期间由于正常收回、不良贷款处置或核销等原因可疑类贷款减少了150亿元，则该银行可疑类贷款迁徙率为（）。
A. 22.22%
B. 25.00%
C. 36.75%
D. 41.27%
What does the SCN represent?（）
A. The system change number, which is a point in time relative to transactions within a given database.
B. A number that represents time. Thus, at 1300 hours, the SCN is the same on all databases.
C. The security change number, which represents the security code that is needed to access any database structure.
D. A conversion factor that converts internal database time to external clock time.
E. UTC time in the database, providing a standardized way of tracking time in Oracle.&e
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