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【简答题】
砂型铸造制造砂型的过程,可分为手工造型和机器造型。按起模的特点的不同手工造型可分为 ________ 、 _________ 、 __________ 、 _____________ 、 __________ 、 _______ 等造型方法。
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【单选题】Shopping for clothes is not the same experience for a man as it is for a woman. A man goes shopping because he needs something. His purpose is settled and decided in advance. He knows what he wants an...
A.
he does not mind how much he has to pay for the right things
B.
he buys cheap things, regardless of quality
C.
he chooses things that others recommend
D.
he buys good quality things, so long as they are not too expensive
【简答题】I. 现有下列8种物质 ① ；② ；③ ；④HF；⑤ ；⑥ ；⑦食盐水；⑧ 其中属于强电解质的是_____________（填序号，下同），既能跟盐酸反应又能跟 溶液反应的是_____________。 II. 现有一瓶浓度为 的某酸溶液，可能为醋酸、盐酸、硫酸中的一种，为了确定该酸溶液的组成进行实验：取 该酸 溶液，逐滴加入 的氢氧化钠溶液，恰好反应完全时所需碱液体积为 ，请用化学用语回答： （...
【单选题】Shopping for clothes is not the same experience for a man as it is for a woman. A man goes shopping because he needs something. His purpose is settled and decided in advance. He knows what he wants, a...
A.
he buys cheap things, regardless of quality
B.
he chooses things that others recommend
C.
he does not mind how much he has to pay for the right things
D.
he buys good quality things, so long as they are not too dear
【简答题】3. My phone, my hair dryer, and my microwave oven
all ____ (break) in the same week.
【简答题】《谏逐客书》中的“书”指的是（ ）。
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