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【简答题】
已知数列b n 前n项和 S n = 3 2 n 2 - 1 2 n ．数列a n 满足 3 a n = 4 -( b n +2) （n∈N * ），数列c n 满足c n =a n b n ． （1）求数列a n 和数列b n 的通项公式； （2）求数列c n 的前n项和T n ； （3）若 c n ≤ 1 4 m 2 +m-1 对一切正整数n恒成立，求实数m的取值范围．
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参考答案：
举一反三
【单选题】下列低容量性低钠血症对机体的影响,哪项是不正确的?
A.
细胞外液减少,易发生休克
B.
无口渴感
C.
早期便有ADH分泌增多，晚期ADH分泌减少
D.
有明显失水体征
E.
肾外因素所致失钠者,尿Na+含量减少
查看完整题目与答案
【简答题】段落阅读: 1. ... A child’s birthday party doesn’t have to be a hassle ; it can be a basket of fun, according to Amy , a mother of two, ages 4 and 18 months. ... What does the underlined word “hassle” prob...
查看完整题目与答案
【单选题】轮胎集中在胎肩上的磨损原因是:
A.
充气压力过高
B.
充气压力过低
C.
前束不正确
D.
外倾角不正确
查看完整题目与答案
【单选题】The article states: "There was no opposition from the parents," Tatsumi said. "It wasn't that difficult a decision for us. We thought it was a great idea." Which would be the closest synonym for the w...
A.
Choice
B.
Software
C.
Reason
D.
Drill
查看完整题目与答案
【单选题】What does the sentence " That living word awakened my soul" mean?
A.
It meant that it gave light, hope and joy to the author.
B.
It meant that it broke down all the barriers before the author, which made learning easy for her.
C.
It means that the author felt a returning thought and she was conscious of the things forgotten
D.
It means that the author realized there existed words, which made her eager to learn and start a new life.
查看完整题目与答案
【多选题】下列关于粒料基层施工对各原材料的技术要求的叙述中，正确的有( )。
A.
级配碎石用作基层时，其压实度不应小于98%
B.
级配砾石或天然砂砾用作底基层时，CBR值对中等交通道路不应小于60%
C.
填隙碎石用作底基层时，最大粒径不应超过60mm
D.
填隙碎石的单层铺筑厚度宜为10~12cm
E.
级配砾石或天然砂砾用作基层时，CBR值不应小于40%
查看完整题目与答案
【单选题】菜贩刘某将蔬菜装入袋中，放在居民小区路旁长条桌上，写明“每袋20元，请将钱放在铁盒内”。然后，刘某去3公里外的市场卖菜。小区理发店的店员经常好奇地出来看看是否有人偷菜。甲数次公开拿走蔬菜时假装往铁盒里放钱。关于甲的行为定性(不考虑数额)，下列哪一选项是正确的?
A.
甲乘人不备，公然拿走刘某所有的蔬菜，构成抢夺罪
B.
蔬菜为经常出来查看的店员占有，甲构成盗窃罪
C.
甲假装放钱而实际未放钱，属诈骗行为，构成诈骗罪
D.
刘某虽距现场3公里，但仍占有蔬菜，甲构成盗窃罪
查看完整题目与答案
【单选题】A child's birthday party doesn't have to be a hassle ; instead, it can be a basket of fun, according to Beth Anaclerio, an Evaston mother of two, ages 4 and 18 months. What does the underlined word "h...
A.
a party designed by specialists
B.
a plan requiring careful thought
C.
a situation causing difficulty or trouble
D.
a demand made by guests
查看完整题目与答案
【多选题】下列有关级配碎石的原材料选择中,论述正确的是( )。
A.
级配碎石的原材料中包括碎石、石屑、矿粉
B.
应控制碎石的针片状颗粒含量不超过一定值
C.
应控制碎石的最大粒径不超过规范要求
D.
应控制碎石的最小粒径不超过规范要求
E.
应控制碎石的压碎值满足规范要求
查看完整题目与答案
【多选题】下列关于粒料基层施工对各原材料技术要求的叙述中，正确的有( )。
A.
级配碎石用作基层时，其压实度应不小于98%
B.
级配砾石或天然砂砾用作底基层时，CBR值对中等交通道路应不小于60%
C.
填隙碎石用作底基层时，最大粒径应不超过60mm
D.
填隙碎石的单层铺筑厚度宜为10～12cm
E.
级配砾石或天然砂砾用作基层时，CBR值应不小于40%
查看完整题目与答案
相关题目：
【单选题】下列低容量性低钠血症对机体的影响,哪项是不正确的?
A.
细胞外液减少,易发生休克
B.
无口渴感
C.
早期便有ADH分泌增多，晚期ADH分泌减少
D.
有明显失水体征
E.
肾外因素所致失钠者,尿Na+含量减少
查看完整题目与答案
【简答题】段落阅读: 1. ... A child’s birthday party doesn’t have to be a hassle ; it can be a basket of fun, according to Amy , a mother of two, ages 4 and 18 months. ... What does the underlined word “hassle” prob...
查看完整题目与答案
【单选题】轮胎集中在胎肩上的磨损原因是:
A.
充气压力过高
B.
充气压力过低
C.
前束不正确
D.
外倾角不正确
查看完整题目与答案
【单选题】The article states: "There was no opposition from the parents," Tatsumi said. "It wasn't that difficult a decision for us. We thought it was a great idea." Which would be the closest synonym for the w...
A.
Choice
B.
Software
C.
Reason
D.
Drill
查看完整题目与答案
【单选题】What does the sentence " That living word awakened my soul" mean?
A.
It meant that it gave light, hope and joy to the author.
B.
It meant that it broke down all the barriers before the author, which made learning easy for her.
C.
It means that the author felt a returning thought and she was conscious of the things forgotten
D.
It means that the author realized there existed words, which made her eager to learn and start a new life.
查看完整题目与答案
【多选题】下列关于粒料基层施工对各原材料的技术要求的叙述中，正确的有( )。
A.
级配碎石用作基层时，其压实度不应小于98%
B.
级配砾石或天然砂砾用作底基层时，CBR值对中等交通道路不应小于60%
C.
填隙碎石用作底基层时，最大粒径不应超过60mm
D.
填隙碎石的单层铺筑厚度宜为10~12cm
E.
级配砾石或天然砂砾用作基层时，CBR值不应小于40%
查看完整题目与答案
【单选题】菜贩刘某将蔬菜装入袋中，放在居民小区路旁长条桌上，写明“每袋20元，请将钱放在铁盒内”。然后，刘某去3公里外的市场卖菜。小区理发店的店员经常好奇地出来看看是否有人偷菜。甲数次公开拿走蔬菜时假装往铁盒里放钱。关于甲的行为定性(不考虑数额)，下列哪一选项是正确的?
A.
甲乘人不备，公然拿走刘某所有的蔬菜，构成抢夺罪
B.
蔬菜为经常出来查看的店员占有，甲构成盗窃罪
C.
甲假装放钱而实际未放钱，属诈骗行为，构成诈骗罪
D.
刘某虽距现场3公里，但仍占有蔬菜，甲构成盗窃罪
查看完整题目与答案
【单选题】A child's birthday party doesn't have to be a hassle ; instead, it can be a basket of fun, according to Beth Anaclerio, an Evaston mother of two, ages 4 and 18 months. What does the underlined word "h...
A.
a party designed by specialists
B.
a plan requiring careful thought
C.
a situation causing difficulty or trouble
D.
a demand made by guests
查看完整题目与答案
【多选题】下列有关级配碎石的原材料选择中,论述正确的是( )。
A.
级配碎石的原材料中包括碎石、石屑、矿粉
B.
应控制碎石的针片状颗粒含量不超过一定值
C.
应控制碎石的最大粒径不超过规范要求
D.
应控制碎石的最小粒径不超过规范要求
E.
应控制碎石的压碎值满足规范要求
查看完整题目与答案
【多选题】下列关于粒料基层施工对各原材料技术要求的叙述中，正确的有( )。
A.
级配碎石用作基层时，其压实度应不小于98%
B.
级配砾石或天然砂砾用作底基层时，CBR值对中等交通道路应不小于60%
C.
填隙碎石用作底基层时，最大粒径应不超过60mm
D.
填隙碎石的单层铺筑厚度宜为10～12cm
E.
级配砾石或天然砂砾用作基层时，CBR值应不小于40%
查看完整题目与答案
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