【单选题】【消耗次数：1】
Only when you have acquired a good knowledge of grammar ____ write correctly.?
①
can you ?
②
will you ?
③
you can ?
④
can’t you?
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相关题目
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How can you keep the machine （）when you are away?
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run
②
to run
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running
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being run
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When you make a self-introduction, you can tell what you do for a ______________.
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job
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life
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living
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taste
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A computer can only do____ you have instructed it to do.
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how
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after
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what
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when
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Can I help you with the bag?
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No, no. I can take it myself
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Thank you
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Sorry, you can’t
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No, I’m all right
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You can not see the doctor ____ you have made an appointment with him.?
①
except ?
②
even ?
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unless ?
④
however?
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Can I help you with your suitcase?
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I have no idea
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No, no. I can carry it myself
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That’s a good idea
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Good morning, Dr Johnson’s office. Can I help you?
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Speaking, please
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I’d like to make an appointment, please
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Yes, go on
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No, you can’t
【单选题】
Sorry, I can’t find the books you asked for.____________
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Don’t mention it.
②
It’s your fault.
③
Thanks anyway.
④
I won’t forgive you.
【单选题】
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①
literature
②
literate
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literary
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literacy
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You can’t be too careful while driving!
①
[A]开车要特别小心！
②
[B]开车不能太小心！
③
[C]你开车时不得不小心翼翼！
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[D]你开车要小心，但切忌谨小慎微！
随机题目
【单选题】
mso-ascii-font-family:Times New Romanmso-bidi-font-family:Times New Romanmso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">下列几组溶液具有缓冲作用的是宋体;mso-hansi-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">( )
①
H2O——NaAc
②
HCl——NaCl
③
NaOH——Na2SO4
④
NaHCO3——Na2CO3
【单选题】
三人对同一样品的分析，采用同样的方法，测得结果为：甲：31.27%、31.26%、31.28%；乙:31.17%、31.22%、31.21%；丙：31.32%、31.28%、31.30%。则甲、乙、丙三人精密度的高低顺序为
①
甲＞丙＞乙
②
甲＞乙＞丙
③
乙＞甲＞丙
④
丙＞甲＞乙
【单选题】
Ag(NH3)2NO3处理下列化合物，生成白色沉淀的是：
①
<img src="https://file.icve.com.cn/file_doc_public/621/600/9B4963664B21A7FF52F94F9329A5164C.png" title="1.png" alt="1.png">
②
<img src="https://file.icve.com.cn/file_doc_public/494/589/7B8935A258D2A17C9E7B5C170954362A.png" title="2.png" alt="2.png">
③
<img src="https://file.icve.com.cn/file_doc_public/896/416/E036827A165B928DAC31C812ED37544E.png" title="3.png" alt="3.png">
④
<img src="https://file.icve.com.cn/file_doc_public/668/236/A703B3758DF4D01AE8F6F08CCA09DBA2.png" title="4.png" alt="4.png">
【单选题】
下列说法不正确的是
①
烷烃卤代反应中卤素的活性顺序为F2＞Cl2 ＞ Br2 ＞ I2
②
烷烃卤代反应中氢的活性顺序为伯氢＜仲氢＜叔氢
③
直连烷烃按碳原子数增多沸点增高
④
直链烷烃按碳原子数增多熔点降低