RTU对监测到的模拟数据进行()求平均值。
A.4min
B.5min
C.6min
参考答案:B
若要求查找姓名中第一个字为‘王’的学生号和姓名。下面列出的SQL语句中,哪个(些)是正确的 Ⅰ.SELECT S#,SNAME FROM S WHERE SNAME='王%' Ⅱ.SELECT S#,SNAME FROM S WHERE SNAMELIKE'王%' Ⅲ.SELECT S#,SNAME FROM S WHERE SNAMELIKE'王'
A.Ⅰ
B.Ⅱ
C.Ⅲ
D.全部
Can the positive integer p be expressed as the product of two integers, each of which is greater than 1 ?() (1)31<p<37 (2)p is odd
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.