规格8.48*0.185*29*23*60*4*R的内螺纹芯头,4代表什么含义,错误的是:()
A.芯头内径4mm
B.芯头齿槽宽4mm
C.芯头长4Cm
D.芯头倒角4°
A.芯头内径4mm
B.芯头齿槽宽4mm
C.芯头长4Cm
D.芯头倒角4°
A.芯头实际外径8.48mm
B.芯头名义外径8.48mm
C.管坯内径8.48mm
D.铜管外径8.48mm
1 1/2 6/11 17/29 23/38 ()
A.117/191
B.122/199
C.28/45
D.31/47
一次,假设各月份该商品买进、售出单价如表1-9所示,问各月进货、售货各多少,才能使总收入最多?试建立此问题的数学模型.
表1-9
月 份 | 7 8 9 10 11 12 |
买进/元 | 28 24 25 27 23 23 |
售出/元 | 29 24 26 28 22 25 |
环海公司是一家小型工业企业,为增值税小规模纳税人。2007年3月取得销售收入8.48万元(含增值税);购进原材料一批,支付货款2.12万元(含增值税)。已知该企业适用的增值税征收率为6%,该企业当月应缴纳的增值税税额为()万元。
A.0.31
B.0.48
C.0.25
D.0.36
某股份公司2006年6月份每日销售额资料如表6-10所示:(单位:万元)
表6-10
某股份公司6月份日销售额数据表
|
要求:
出现故障之前的月份 (分等级) | 机器出现故障之前 的实际月份 | 机器出现故障之前 的期望月份 |
小于17 18~20 21~23 24~26 27~29 30及更多 | 6 24 28 18 14 10 总计100 | 9 17 27 25 15 7 总计100 |
要求:检验故障的实际分布与正态分布是否有明显差别。(α=0.05)
One year, made 445 days long by imperial decree, brought the calendar back in step with the seasons. Then the solar year (with the value of 365 days and 6 hours) was made the basis of the calendar. The months were 30 or 31 days in length, and to take care of the 6 hours, every fourth year was made a 366-day year. Moreover, Caesar decreed the year began with the first of January, not with the vernal equinox in late March.
This calendar was named the Julian calendar, after Julius Caesar, and it continues to be the calendar of the Eastern Orthodox churches to this day.
(30)
A.Shortage of days.
B.Superstition.
C.Inability to divide the year.
D.Too many months.