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Steven’s New Sled Steven woke on Christmas morning to find a new sled. “Oh , wow!” he shouted. This was the best Christmas 1 . Steven was still excited as the rest of his family opened their gifts. Secretly, he hoped he could get outside quickly to try out his new sled. Finally, Steven asked, "Dad, is it okay if I try out my sled?" Dad 2 . Soon, Steven was sledding down Twin Hills in the neighbourhood park. He felt the wind against his face as he flew down. Later that day, Steven carefully leaned ( 靠 ) the sled up against the outside of his house under his bedroom window. The next day, Steven ran outside as soon as he could. "Oh, no! " Steven shouted. His sled was missing! He ran as fast as he could to the park. There at Twin Hills he 3 it! Steven’s neighbour, Kevin, was on Steven’s new sled! “Kevin! That’s my sled! You stole my new sled!” But Kevin just laughed and headed up the hill for another run down. Steven ran home, crying all the way. He found his dad in the garage and told him what had happened. Steven’s dad said, “Calm down, Son. There may be another 4 for the missing of your sled.” Steven couldn't believe his dad was 5 with Kevin. "But, Dad. Kevin's at Twin Hills using my sled right now! We need to go to get it!” Dad said 6 , "First of all, you need to make sure your sled is actually stolen. Look over there. "Steven was 7 at what he saw. His sled leaned against the wall of the garage next to his bicycle. Dad put his arm around Steven and said , “I put your sled away last night when I saw you had left it outside.” Steven 8 his head. He felt bad about the way he had spoken to his neighbour. "I should say sorry to Kevin, "he said. Dad replied, “There's no time like the present.”
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【简答题】游标卡尺测量工作结束后要平放,尤其是大尺寸的游标卡尺更应注意,否则尺身会()。
【单选题】比例分配的优势不包括( )
A.
自加权
B.
容易理解
C.
操作简单
D.
估计量方差最小
【单选题】下列各句中加点字不属于词类活用的一项是( )
A.
以天下之美为己任
B.
少仲尼之闻
C.
而轻伯夷之义者
D.
泾流之大
【单选题】某土方工程,施工合同约定:工程无预付款,进度款按月结算,工程保留金从第一个月起按工程进度款5%的比例逐月扣留,监理工程师签发月度付款凭证的最低金额为25万元。经监理工程师计量确认,施工单位第一个月完成工程款23万元,第二个月完成工程款42万元,则第二个月监理工程师签发的实际付款凭证金额为( )万元。
A.
25.00
B.
39.00
C.
42.00
D.
61.75
【单选题】奈曼最优分配( )、比例分配( )的分层随机抽样与相同样本量的简单随机抽样( )的精度之间的关系式为( )
A.
≤ ≤
B.
≤ ≤
C.
≥ ≤
D.
≤ ≤
【单选题】( )有等比例抽样、按各层的离散情况分配样本和最优分配三种抽样方法。
A.
简单随机抽样
B.
系统抽样
C.
分层抽样
D.
整群抽样
【判断题】分离定理是先确定最优风险资产组合,然后在最优风险资产组合和无风险资产之间进行比例分配
A.
正确
B.
错误
【单选题】某土方工程,施工合同约定:工程无预付款,进度款按月结算,工程保留金从第一个月起按工程进度款5%的比例逐月扣留,监理工程师签发月度付款凭证的最低金额为25万元。经监理工程师计量确认,施工单位第一个月完成工程款23万元,第二个月完成工程款42万元,则第二个月监理工程师签发的实际付款凭证金额为()万元。
A.
25.00
B.
30.90
C.
42.00
D.
61.75
【判断题】游标卡尺使用结束后,应将游标卡尺擦清上油,平放在专用盒内。
A.
正确
B.
错误
【单选题】某土方工程,施工合同约定:工程无预付款,进度款按月结算,工程保留金从第一个月起按工程进度款5%的比例逐月扣留,监理工程师签发月度付款凭证的最低金额为25万元,经监理工程师计量确认,施工单位第一个月完成工程款23万元,第二个月完成工程款42万元,则第二个月监埋工程师签发的实际付款凭证金额为()万元
A.
39.9
B.
25
C.
61.75
D.
42
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