【单选题】【消耗次数：1】
Oh, I’m sorry. But I promise I’ll be careful next time.
①
It’s nothing at all
②
Oh, never min
③
It doesn’t matter
④
Thank you
⑤
There are no questions
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相关题目
【单选题】
— Oh, Im sorry. But I promise Ill be more careful next time.— _______________________.
①
Its nothing
②
Oh, never mind. It doesnt matter
③
Thank you
④
There are no questions
【单选题】
-I’m sorry I broke your mirror.-Oh, really? ____.
①
It’s OK with me
②
It doesnt matter
③
Don’t be sorry
④
I don’t care
【单选题】
—I’m sorry to keep you waiting. —Oh, not at all. I___ here only a few minutes.
①
have been
②
had been
③
was
④
will be
【单选题】
—I’ve got an offer in New York. —Oh, ____! But I’m going to miss you.
①
That’s too bad
②
I’m sorry
③
I beg your pardon
④
That’s great
【单选题】
Thank you for your time. I’m looking forward to ______.
①
you reply
②
your reply
③
you answer
④
you to answer
【单选题】
I’m very sorry to have ____ you with so many questions on such an occasion.
①
interfered
②
offended
③
impressed
④
bothered
【单选题】
“Can I help you?” “Well, I’m afraid the box is too heavy for you, ____ thank you all the same.”
①
and
②
so
③
but
④
or
【单选题】
----Amy, I called you yesterday evening, but nobody answered the phone.----Oh, I _______ a walk with my mother at that time.
①
take
②
took
③
am taking
④
was taking
【单选题】
40.—I`m sorry I didn`t do a good job. ---Never mind.____you have tried your best.
①
Aboveall
②
Aboveall
③
Atall
④
Afterall
随机题目
【判断题】
若对任意<img class=jc-formula data-tex=x,y src=https://huaweicloudobs.ahjxjy.cn/7C8885869FD3D90C6BE17B406B781F97.png style=vertical-align: middle;/>,<img class=jc-formula data-tex=P(X\le x,Y\le y)=P(X\le x)P(Y\le y) src=https://huaweicloudobs.ahjxjy.cn/4E907C78037E0B8AA722D84D91A5465D.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=X,Y src=https://huaweicloudobs.ahjxjy.cn/7ADC839F5F3346E7C68A191C8BA75ADA.png style=vertical-align: middle;/>相互独立。
①
正确
②
错误
【判断题】
若<img class=jc-formula data-tex=P(X\le x,Y\le y)=P(X\le x)P(Y\le y) src=https://huaweicloudobs.ahjxjy.cn/4E907C78037E0B8AA722D84D91A5465D.png style=vertical-align: middle;/>,则随机变量<img class=jc-formula data-tex=X,Y src=https://huaweicloudobs.ahjxjy.cn/7ADC839F5F3346E7C68A191C8BA75ADA.png style=vertical-align: middle;/>独立。
①
正确
②
错误
【判断题】
设二维随机变量<img class=jc-formula data-tex=(X,Y) src=https://huaweicloudobs.ahjxjy.cn/5397F429C2F8D6C371FC104B680E7FA8.png style=vertical-align: middle;/>联合分布密度函数为:<img class=jc-formula data-tex=f(x,y)=\left\{ \begin{ matrix } k{ e }^{ -(2x+y) },x0,y0, \\ 0,其他， \end{ matrix } \right src=https://huaweicloudobs.ahjxjy.cn/5D1F623136C9C55E2DA3BF1AD4A1BD74.png style=vertical-align: middle;/>则分布函数为：<img class=jc-formula data-tex=F(x,y)=\left\{ \begin{ matrix } (1-{ e }^{ -2x })(1-{ e }^{ -y }),x0,y0, \\ 0,其他。 \end{ matrix } \right src=https://huaweicloudobs.ahjxjy.cn/0926EE0FF416ADC7CE06CC37431BFB8D.png style=vertical-align: middle;/>
①
正确
②
错误