【单选题】【消耗次数:1】
This record will help your safety officer ----what the problem is
bring up
put on
find out
take in
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相关题目
【单选题】 ____ find out what had happened.
①  Not until he woke up did he
②  Not until he woke up he
③  Until he woke up did he
④  Until he woke up he
【单选题】 A: Could you help me put up the posters on the wall? B: [填空].
①  I will
②  No problem
③  I would like
④  Thats a good idea
【单选题】 10. ______ radio ______ and try to find out what’s wrong with it.
①  Take…apart
②  Tell…apart
③  Cutting…into pieces
④  Separate…apart
【单选题】 I don’t think you can work out the maths problem ___ her help.
①  since
②  unless
③  with
④  without
【单选题】 Why not ______with me? Violent exercise might help to shake you out of your disappointment in love.
①  do some sports
②  to do some sports
③  by doing some sports
④  about to do some sports
【判断题】 Travel agents can help you find out information about package trips that include hotel costs, tours and entrance tickets and so on .
①  正确
②  错误
【单选题】 ______,the boy worked out the problem quickly.
①  As clever he is
②  Clever as he is
③  He is as clever
④  As he is clever
【单选题】 A fire broke out at the school but the teacher were able to lead the ___________ children to safety.
①  frightened
②  frightening
③  frighten
④  fright
【单选题】 I’m afraid he _______find the key to this problem.
①  could never
②  never could
③  couldn’t never
【单选题】 The problem is () it may take time for new facts to become available.
①  that
②  how
③  what
④  if
随机题目
【单选题】 设随机变量,且与相互独立,则()
①  7
②  6
③  5
④  4
【单选题】 设随机变量和的密度函数分别为若与相互独立,则()
①  1
【单选题】 某种商品进行有奖销售,每购买一件有的中奖概率。现某人购买了20件该商品,用随机变量X表示中奖次数,则X的分布为()
①  正态分布
②  指数分布
③  泊松分布
④  二项分布
【单选题】 设总体,则的矩估计和极大似然估计分别为()
①  矩估计极大似然估计
②  矩估计极大似然估计
③  矩估计极大似然估计
④  矩估计极大似然估计
【单选题】 已知,则()
①  6
②  22
③  30
④  46
【单选题】 已知随机变量服从泊松分布,且则()
① 
②  1
【单选题】
①  上三角
②  下三角
③  对角形
④  即非上三角也非下三角
【单选题】 下列命题中错误的是()
① 
② 
③  时,与存在完全线性关系
④  ,与之间无线性关系
【单选题】 二次型是()
①  正定的
②  半正定的
③  负定的
④  不定的
【单选题】 某种动物活20年的概率为0.8,活25年的概率为0.6,现有一只该动物已经活了20年,它能活到25年的概率是()
①  0.48
②  0.6
③  0.8
④  0.75