【单选题】【消耗次数:1】
6. Don’t_________to 1et me know if there s anything I can do for you.
hesitate
reject
puzz1e
thrill
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相关题目
【单选题】 13.Don’t ______ to let me know if there’s anything I can do for you.
①  thrill
②  hesitate
③  reject
④  puzzle
【单选题】 A: Is there anything I can do for you? B: [填空], there is something.
①  No, nothing
②  Well, now that you ask
③  Nothing I can think of
④  If you ask me
【单选题】 Excuse me. I don’t want to interrupt you but …
①  Can I help you?
②  Certainly, how dare you
③  It’s quite all right
④  Yes, you did
【单选题】 My daughter bought me an IPAD,but I don’t know_____.
①  A.what to know
②  B.which one to use
③  C.when to use
④  D.how to use it
【判断题】 I don’t know what you are talking about.
①  正确
②  错误
【单选题】 I didn’t know what to do, but then an idea suddenly ________ to me.
①  appeared
②  happened
③  occurred
④  emerged
【单选题】 I don’t know you want to keep the letter, I’ve _____it up.
①  torn
②  given
③  broken
④  disposed
【单选题】 Don’t hesitate ______ for help if you have any problem meeting the schedule.
①  to ask
②  asked
③  asking
④  to be asked
【单选题】 Woman: Bob, do you think you can lend me fifty dollars? Bob: Let me see. ____
①  You know I have no money at all.
②  Sorry, I don’t think I have much with me.
③  I don’t think you should do it.
④  Oh, I have quite a lot.
【单选题】 If you don’t go, ____ I.
①  nor shall
②  so don’t
③  neither do
④  so do
随机题目
【判断题】 若A={男足球队员},则<img class=jc-formula data-tex=\overline { A } src=https://huaweicloudobs.ahjxjy.cn/3EEC120FC93CB6E352E860EAAB3C025E.png style=vertical-align: middle;/>={女足球队员}。
①  正确
②  错误
【判断题】 对任两事件A,B,有P(A-B)=P(A)-P(AB).
①  正确
②  错误
【判断题】 设A、B是Ω中的随机事件,则A-B<img class=jc-formula data-tex=\subset src=https://huaweicloudobs.ahjxjy.cn/253E031303AB49BC55023C8805C0E5CD.png style=vertical-align: middle; width: 24px; height: 18px; width=24 height=18/>A.
①  正确
②  错误
【判断题】 设A、B是Ω中的随机事件,必有P(A-B)=P(A)-P(B).
①  正确
②  错误
【判断题】 若事件A的概率P(A)=0,则<img class=jc-formula data-tex=A=\emptyset src=https://huaweicloudobs.ahjxjy.cn/A2F5905B6C68762EA249E2884A390CFC.png style=vertical-align: middle;/>.
①  正确
②  错误
【单选题】 袋中有50个乒乓球,其中20个黄的,30个白的,现在两个人不放回地依次从袋中随机各取一球。则第二人取到黄球的概率是
①  1/5
②  2/5
③  3/5
④  4/5
【单选题】 A、B、C为三个事件,P(AB)0且<img class=jc-formula data-tex=P(C\left| AB \right) =1 src=https://huaweicloudobs.ahjxjy.cn/8177738425B324A6BFCB04768183A5AD.png style=vertical-align: middle;/>,则有
①  <img class=jc-formula data-tex=P(C)\le P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/FE4D23A75A0FDF615549CD693CCA4074.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=P(C)\le P(A\cup B) src=https://huaweicloudobs.ahjxjy.cn/D908533FA4E32BF92BD6E565BAE24E0D.png style=vertical-align: middle;/>
③  <img class=jc-formula data-tex=P(C)\ge P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/1A87B835222822C61BB0298E2EFFEC94.png style=vertical-align: middle;/>
④  <img class=jc-formula data-tex=P(C)\ge P(A\cup B) src=https://huaweicloudobs.ahjxjy.cn/B9B10409076CBBE380350A5B7C015177.png style=vertical-align: middle;/>
【单选题】 从1、2、3、4、5 这五个数字中等可能地、有放回地接连抽取两个数字,则这两个数字不相同的概率为
①  1/2
②  2/25
③  4/25
④  以上都不对
【单选题】 对于事件A,B,下列命题正确的是
①  若A,B互不相容,则<img class=jc-formula data-tex=\overline { A } src=https://huaweicloudobs.ahjxjy.cn/3EEC120FC93CB6E352E860EAAB3C025E.png width=23 height=22 style=white-space: normal; font-family: 宋体; font-size: 14px; vertical-align: middle; width: 23px; height: 22px;/>与<img class=jc-formula data-tex=\overline { B } src=https://huaweicloudobs.ahjxjy.cn/0E9B39069462B29161944E09024CF7D8.png width=22 height=19 style=white-space: normal; font-family: 宋体; font-size: 14px; vertical-align: middle; width: 22px; height: 19px;/>也互不相容。
②  若A,B相容,那么<img class=jc-formula data-tex=\overline { A } src=https://huaweicloudobs.ahjxjy.cn/3EEC120FC93CB6E352E860EAAB3C025E.png width=23 height=22 style=white-space: normal; font-family: 宋体; font-size: 14px; vertical-align: middle; width: 23px; height: 22px;/>与<img class=jc-formula data-tex=\overline { B } src=https://huaweicloudobs.ahjxjy.cn/0E9B39069462B29161944E09024CF7D8.png width=22 height=19 style=white-space: normal; font-family: 宋体; font-size: 14px; vertical-align: middle; width: 22px; height: 19px;/>也相容。
③  若A,B互不相容,且概率都大于零,则A,B也相互独立。
④  若A,B相互独立,那么<img class=jc-formula data-tex=\overline { A } src=https://huaweicloudobs.ahjxjy.cn/3EEC120FC93CB6E352E860EAAB3C025E.png style=font-family: 宋体; font-size: 14px; white-space: normal; vertical-align: middle; width: 23px; height: 22px; width=23 height=22/>与<img class=jc-formula data-tex=\overline { B } src=https://huaweicloudobs.ahjxjy.cn/0E9B39069462B29161944E09024CF7D8.png style=font-family: 宋体; font-size: 14px; white-space: normal; vertical-align: middle; width: 22px; height: 19px; width=22 height=19/>也相互独立。
【单选题】 当事件A与事件B同时发生时,事件C必发生,则
①  <img class=jc-formula data-tex=P(C)\le P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/FE4D23A75A0FDF615549CD693CCA4074.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=P(C)\ge P(A)+P(B)-1 src=https://huaweicloudobs.ahjxjy.cn/1A87B835222822C61BB0298E2EFFEC94.png style=vertical-align: middle;/>
③  P(C)=P(AB)
④  <img class=jc-formula data-tex=P(C)=P(A\cup B) src=https://huaweicloudobs.ahjxjy.cn/60E6C036BB44365D21CFADA8E2F5C773.png style=vertical-align: middle;/>