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【单选题】
浇筑柱子混凝土时，其根部应先浇( ) 目的是防止烂根。A.
5～10mm厚水泥浆
B.
5～10mm厚水泥砂浆
C.
50～100mm厚水泥砂浆
D.
500mm厚石子增加一倍的混凝土
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举一反三
【单选题】The Foreign Service is a branch of the Department of State．
A.
center
B.
division
C.
root
D.
base
【单选题】Quantum mechanics is a branch of physics,it was initially developed to explain atoms.
A.
Quantum mechanics is a branch of physics;it was initially developed to explain atoms.
B.
Quantum mechanics, a branch of physics, was initially developed to explain atoms.
C.
Quantum mechanics is a branch of physics;It was initially developed to explain atoms.
D.
Both A and B are correct.
【简答题】实验室中用下列装置制FeCl 3 ，可供选择的试剂有：①MnO 2 ②NaOH溶液 ③饱和NaCl溶液 ④浓硫酸 ⑤浓盐酸。 （1）按气体流向由左到右排列，各装置的连接顺序为（填写A~E序号） （2）实验开始时先点燃A处酒精灯，点燃B处酒精灯前必须观察到的现象是______________________________。 （3）A装置烧瓶中反应的方程式是________________C中所...
【多选题】A2题型】女31岁,第一胎39周见红,规律宮缩,临产后行灌肠的适应症是
A.
胎膜已破,先露高位为-2,胎心音正常
B.
阴道出血,量较多 c.产程顺利,估计1小时内胎儿即可娩 D.胎膜未破,宮颈扩张2cm,先露高位为+1 E.臀先露,胎心好
【简答题】材料抗渗性大小与()和()有关。
【简答题】American Structuralism is a branch of diachronic linguistics that emerged independently in the United States at the beginning of the twentieth century.
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