信息系统实施的依据是()
A.系统规划报告
B.系统分析说明书
C.系统设计说明书
D.系统程序说明书
参考答案:C
According to the school rules, if a student _________ happen to damage something by accident,he/she should report it to a teacher or the office immediately.
A.should
B.will
C.shall
D.would
标准贯入试验(SPT)是采用质量为63.5g的穿心锤,以76cm的落距,将一定规格的标准贯入器打入土中(),然后将标准贯入器再打入土中(),以此锤击数作为标准贯入试验指标。
A.30cm,15cm
B.15cm,30cm
C.10cm,20cm
D.20cm,10cm