【单选题】【消耗次数:1】
The Anti ---Japanese War____ in 1937 and it ____ eight years.
break out; last
was broken out; lasted
broke out; last
broke out; lasted
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【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】 13. A fire broke out at the school but the teacher were able to lead the ___________ children to safety.
①  frightened
②  frightening
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【单选题】 This ATM has been out of service for a few days. It should ____ last week.
①  be fixed
②  have fixed
③  fix
④  have been fixed
【单选题】 This ATM has been out of service for a few days. It should ____ last week.
①  be fixed
②  have fixed
③  fix
④  have been fixed
【单选题】 You _____ her in her office last Friday, she’s been out of town for two weeks.
①  needn’t have seen
②  must have seen
③  might have seen
④  can’t have seen
【单选题】 A: Lets eat out, shall we? B: Im broke. Ive gone through my paycheck for the week already. A: Dont worry. [填空].
①  Lets split the bill
②  We can find a way
③  Its my treat
④  Just fast food
【单选题】 16.-This dress was last year’s style. -I think it still looks perfect ______ it has gone out this year.
①  so that
②  even though
③  as if
④  ever since
【单选题】 Only in this way ____ out of the plan.
①  you can talk him
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【判断题】 Lets go out for a walk.
①  正确
②  错误
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①  go
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随机题目
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/C92407F815151000CA4AC9483911D54B.png title=题干.png alt=题干.png width=820 height=111 style=width: 820px; height: 111px;/>
①  <img src=https://huaweicloudobs.ahjxjy.cn/2FC74D076255E936F6524710B944EEA3.png style= title=2.png/>
②  <img src=https://huaweicloudobs.ahjxjy.cn/6BF421D92F29AC09C5AB2BC76A673DF6.png title=3.png style=white-space: normal;/>
③  <img src=https://huaweicloudobs.ahjxjy.cn/25CAA6A8D5EB3AC996C1B6EBB98815F8.png title=1.png style=white-space: normal;/>
④  <img src=https://huaweicloudobs.ahjxjy.cn/94164A0E9B1002F4D1358BF875A8EBD2.png title=4.png style=white-space: normal;/>
【单选题】 (X,Y)是二维随机向量,与COV(X,Y)=0不等价的是( ).
①  EXY=EXEY
②  D(X+Y)=DX+DY
③  D(X-Y)=DX+DY
④  X与Y独立
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/89DBC93941E2FAD1D73334961AE19AAC.png title=题干.png alt=题干.png width=731 height=50 style=width: 731px; height: 50px;/>
①  50
②  100
③  120
④  150
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/F34769F580544CC4F837D2409D3C88C1.png title=题干.png alt=题干.png width=820 height=136 style=width: 820px; height: 136px;/>
①  <img src=https://huaweicloudobs.ahjxjy.cn/58748F0735C46E03B72015E7C0CF02F5.png style= title=1.png/>
②  <img src=https://huaweicloudobs.ahjxjy.cn/8600C162BDB85BF564DEE9D96CF5FA5B.png title=2.png style=white-space: normal;/>
③  <img src=https://huaweicloudobs.ahjxjy.cn/622EB727D3D79F0C07651DF85832635D.png title=3.png style=white-space: normal;/>
④  <img src=https://huaweicloudobs.ahjxjy.cn/073909FF6C006AC6F29262575671F101.png title=4.png style=white-space: normal;/>
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/EA55C60C5EC111CC2EE4EB58B5CF8CFF.png title=题干.png alt=题干.png width=821 height=173 style=width: 821px; height: 173px;/>
①  <img src=https://huaweicloudobs.ahjxjy.cn/E516827D224C56D6A18DBD6383291705.png style= title=1.png/>
②  <img src=https://huaweicloudobs.ahjxjy.cn/C4216A2BD2C3D004610836C1440ECE65.png title=3.png style=white-space: normal;/>
③  <img src=https://huaweicloudobs.ahjxjy.cn/51F6334934E0C4FA20812F52CAEBB084.png title=2.png style=white-space: normal;/>
④  <img src=https://huaweicloudobs.ahjxjy.cn/58D8007F207C85E2495B6D2D6F73BF8A.png title=4.png style=white-space: normal;/>
【单选题】 <img src=https://huaweicloudobs.ahjxjy.cn/C0887239F3FA27B85B766A61F5F343DB.png title=题干.png alt=题干.png width=828 height=60 style=width: 828px; height: 60px;/>
①  <img src=https://huaweicloudobs.ahjxjy.cn/8AF64C29BAB37D99196FCC12CFF23E1C.png style= title=1.png/>
②  <img src=https://huaweicloudobs.ahjxjy.cn/5631E19015720FE565D7079BAE6633A9.png title=3.png style=white-space: normal;/>
③  <img src=https://huaweicloudobs.ahjxjy.cn/2104F988AAF71B84CC6A46330A32E207.png title=2.png style=white-space: normal;/>
④  <img src=https://huaweicloudobs.ahjxjy.cn/9B5F10583D6A30F5960F7A482BDF2450.png title=4.png style=white-space: normal;/>
【单选题】 设A,B为任意两个事件,则事件(AUB)(<img class=jc-formula data-tex=\Omega src=https://huaweicloudobs.ahjxjy.cn/6CE47998CD8FC7F39C9B15F310CFF80F.png style=vertical-align: middle;/>-AB)表示( )
①  必然事件
②  A与B恰有一个发生
③  .不可能事件
④  A与B不同时发生
【单选题】 设A,B为随机事件,则下列各式中不能恒成立的是( ).
①  P(A-B)=P(A)-P(AB)
②  P(AB)=P(B)P(A|B),其中P(B)0
③  P(A+B)=P(A)+P(B)
④  P(A)+P(<img class=jc-formula data-tex=\overline { A } src=https://huaweicloudobs.ahjxjy.cn/36D283232F29E89615F76C135EDD1356.png style=vertical-align: middle;/>)=1
【单选题】 设X,Y独立同分布P(X=-1)=P(Y=-1)=1/2,P(X=1)=P(Y=1)=1/2则
①  X=Y
②  P(X=Y)=0
③  P(X=Y)=1/2
④  P(X=Y)=1
【单选题】 下式中恒成立的是( ).
①  EXY=EXEY
②  D(X-Y)=DX-DY
③  COV(X,AX+B)=ADX
④  D(X+1)=DX+1