【单选题】【消耗次数：1】
I don’t think you can work out the maths problem ___ her help.
①
since
②
unless
③
with
④
without
参考答案：
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相关题目
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19._____ all this work and so little sleep at night, I don’t think I can go on much longer.
①
What about
②
What if
③
What with
④
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Don’t hesitate ______ for help if you have any problem meeting the schedule.
①
to ask
②
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③
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④
to be asked
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①
No, no. I can take it myself
②
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③
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④
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I don’t think you’ll be able to understand this formula（公式）___ you finish school.
①
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②
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③
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②
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③
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①
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②
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③
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④
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①
?must; can; must; his
②
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③
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④
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随机题目
【单选题】
提高供电电路的功率因数，下列说法正确的是（ ）。
①
减少了用电设备中无用的无功功率
②
减少了用电设备的有功功率，提高了电源设备的容量
③
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④
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