皮皮学，免费搜题
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【单选题】
钢筋接头宜设置在受力较小处,同一根钢筋不宜设置()接头,同一构件中的纵向受力钢筋接头宜相互错开。A.
1个以上
B.
2个以上
C.
3个以上
D.
4个以上
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】听力原文：M: Allan is in the basement, trying to repair the washing machine. W: Shouldn't he be working on his term paper? Q: What does woman think Allan should do? (17)
A.
Move the washing machine to the basement.
B.
Turn the basement into a workshop.
C.
Repair the washing machine.
D.
Finish his assignment.
【单选题】听力原文：M: Elien is in the basement trying to repair the washing machine. W: He isn't going to work on his term paper? What does woman think Elien should do?
A.
Move the washing machine to the basement.
B.
Turn the basement into a workshop.
C.
Repair the washing machine.
D.
Finish his assignment.
【简答题】某化学兴趣小组欲研究一种镁铝合金，以下是部分实验。请完成填空。 [实验一]从镁铝合金片上剪下一小块，先称重，然后投到盛有10 mL 10 mol· L -1 NaOH溶液（足量）的锥形瓶里。 (1)从反应开始至反应结束，依次可观察到的现象有： ①切口断面处先产生气泡，反应由慢到快；②小块合金在溶液中上下翻腾；③溶液升温；④反应后，溶液中残留黑色固体。 (2)开始时产生气泡速率慢，其主要原因（除温度...
【简答题】W: We are unhappy with the machine we received last month. M: I’m very sorry to hear that. We seldom ____1__ about our products or services. W: Your trouble-free machine Lampe 300 has actually ___2_...
【简答题】设有“学生”和“班级”2个实体集，这些学生来自同一个班级，“学生”和“班级”2个实体间的联系是（ ）。
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