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【单选题】
下列各组物质中，前者属于单质、后者属于混合物的是（ ）A.
氢气 矿泉水
B.
铁 冰水混合物
C.
自来水 蒸馏水
D.
二氧化碳 空气
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反馈参考答案：
举一反三
【单选题】关于浇口应用描述不正确的是( )。
A.
点浇口用于三板模，潜伏式浇口用于二板模
B.
直浇口适于粘度高，流动性差的塑胶成形
C.
侧浇口从塑件侧面进料，尤其适用于一模多腔
D.
护耳式浇口适合于PP、PS塑料成型
【简答题】The old houses are being pulled down to ______________ a new office block. A: take the place of B; make room for C; make use of
【单选题】The old houses are being pulled down to ____ a new office block.
A.
supply with
B.
make use of
C.
make room for
D.
take the place of
【单选题】关于结合胆红素的描述, 不正确 的是
A.
为非结合胆红素与葡萄糖醛酸结合
B.
为非结合胆红素与血清白蛋白结合
C.
水溶性
D.
可通过肾小球滤过，尿中可检出
E.
胆汁淤滞性黄疸显著增高
【简答题】A．Shopping centers are very common. B．New houses should be built. C．The old houses should be kept. D．They need more shopping centers.
【单选题】The old houses are being pulled down to ____ a new office block.
A.
supply with
B.
make use of
C.
make room for
D.
take the place
【单选题】The new teaching building will be built ____ the old houses are.
A.
what
B.
in which
C.
the place where
D.
where
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