【单选题】【消耗次数：1】
He lies down and [填空] a rest.
①
having
②
have
③
to have
④
has
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相关题目
【单选题】
Does Robert have [填空] computer? —Yes,he has [填空] ．
①
an,some
②
a,one
③
a,/
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any,one
【单选题】
3. He ______ hard until I told him to sit down and have a break.
①
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①
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随机题目
【单选题】
精馏塔操作时，其温度和压力从塔顶到塔底的变化趋势是————。
①
温度逐渐增大，压力逐渐减小
②
温度逐渐减小，压力逐渐增大
③
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【单选题】
某二元理想溶液，其组成x=0.6(摩尔分数，下同)，相应的温度为t1，与之相平衡的汽相组成y=0.7，相应的温度为t2，则下面说法正确的是 。
①
(a) t1= t2
②
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③
（c） t1 t2
④
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