【单选题】【消耗次数:1】
JT/BT/ST刀柄柄部锥度为( )。
7:24
1:10
1:5
1:12
参考答案:
复制
纠错
➡️如需代学继续教育,联系微信:yizhituziang

相关题目
【单选题】 假定一个初始堆为(1, 5, 3, 9, 12, 7, 15, 10),则进行第一趟堆排序后得到的结果为(( )。
①  3, 5, 7, 9, 12, 10, 15, 1
②  3, 5, 9, 7, 12, 10, 15, 1
③  3, 7, 5, 9, 12, 10, 15, 1
④  3, 5, 7, 12, 9, 10, 15, 1
【单选题】 若有以下说明,int?a[12]={1,2,3,4,5,6,7,8,9,10,11,12};?则数值为4的表达式是()
①  a[4]
②  a(3)
③  a[3+1]
④  a[4]-a[0]
【单选题】 若有以下数组说明inta[12]={1,4,7,10,2,5,8,11,3,6,9,12};则i=10;a[a[i]]元素数值是( )。
①  10
②  9
③  6
④  5
【单选题】 设二维随机变量 只取下列数组中的值:(0,0)(-1,1)(-1,1/3)(2,0)且相应概率依次为1/6,1/3,1/12,5/12,则E(X+Y)=( )
①  3/7
②  5/6
③  10/9
④  7/9
【单选题】 假定对元素序列(7, 3, 5, 9, 1, 12)进行堆排序,并且采用小根堆,则由初始数据构成的初始堆为( )。
①  1, 3, 5, 7, 9, 12
②  1, 3, 5, 9, 7, 12
③  1, 5, 3, 7, 9, 12
④  1, 5, 3, 9, 12, 7
【单选题】 设A ={1,3,5,7},B = {5, 7, 9,11},则A∪B是()
①  {1,3, 5}
②  {1,3,5,7}
③  {1, 3, 5, 7,9}
④  {1, 3, 5, 7,9, 11}
【单选题】 设二维随机变量(X,Y)只取下列数组中的值:(0,0)(-1,1)(-1,1/3)(2,0)且相应概率依次为1/6,1/3,1/12,5/12,则E(X+Y)=( )
①  7/9
②  3/7
③  5/6
④  10/9
【单选题】 以下程序段运行后sum的值为()。intk=0,sum=0;inta[3][4]={1,2,3,4,5,6,7,8,9,10,11,12};for(;kk++)sum+=a[k][k+1];
①  9
②  18
③  19
④  21
【判断题】 袋中有编号为1到10的10个球,今从袋中任取3个球,则3个球的最小号码为5的概率为1/12。
①  正确
②  错误
【判断题】 已知X只取-1,1,5,相应的概率为1/(2k),1/(4k),1/(8k)则常数k=7/8.
①  正确
②  错误
随机题目
【单选题】 As we can no longer wait for the delivery of our order, we have to ____ it.
①  postpone
②  refuse
③  delay
④  cancel
【单选题】 establish a __________
①  new product
②  public company
③  sole trader
④  limited company
【单选题】 If one ()  by vanity, he will be very particular about other’s clothing and appearance.
①  overcomes
②  is overcome
③  overcame
④  has been overcame
【单选题】 Tom, what did you do with my documents? I have never seen such a _______ and disorder!
①  mess
②  mass
③  guess
④  bus
【单选题】 Unbelievable! I have failed my final exam for mathematics!____________
①  Good luck.
②  Cheer up.
③  Go ahead.
④  No problem.
【单选题】 Niagara Falls is a great tourist _____, drawing millions of visitors every year.
①  attention
②  attraction
③  appointment
④  arrangement
【单选题】 How was your trip to Paris, Mary? ____________
①  Oh, wonderful indeed.
②  I went there alone.
③  The guide showed me the way.
④  By plane and by bus.
【单选题】 That does not do much to _______ the prospects(前途) of kids in the city.
①  brighten
②  soften
③  quicken
④  sharpen
【单选题】 Generally, you should avoid()business over a meal until your host gives a signal.
①  talk about
②  talking about
③  to talk about
④  talked about
【单选题】 Williams proposal,()at a board meeting last week, was to set up a committee to review the marketing plan.
①  discuss 
②  discussing
③  discussed
④  to be discussed