单项选择题

A、
B、
C、
D、

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单项选择题

The modern metre is______.
A、the length of the path travelled by light in vacuum during a time interval of 1/29,97,92,458 of a second
B、16,50,763.73 × wavelengths of the red–orangeradiation of a krypton 86 atom in vacuum
C、the length of the path travelled by light in vacuum during a time interval of1/399,792,458 of a second
D、1,660,793.73 × wavelengths of the redorange radiation of a krypton 86 atom invacuum

单项选择题

执行以下语句：
CREATE TABLE #S
( sno char(4),
sname char(8),
sage int
)
则#S数据表创建在（）数据库中。
A、S
B、master
C、tempdb
D、msdb