试题与答案

如下图所示的“化学多米诺实验”,打开分液漏斗的活塞A,可观察到D中的液体沿导管流

题型:填空题

题目:

如下图所示的“化学多米诺实验”,打开分液漏斗的活塞A,可观察到D中的液体沿导管流进C,在C中反应产生一种能使带火星木条复燃的气体。请回答以下问题:

(1)B中发生反应的化学方程式___________________________;

(2)C中发生反应的化学方程式___________________________。

答案:

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①不必说                                         ,高大的皂荚树,紫红的桑椹;也不必说                            ,肥胖的黄蜂伏在菜花上,轻捷的叫天子忽然从草间直窜向云霄里去了。②单是周围的短短的泥墙根一带,就有无限的趣味。③油蛉在这里低唱,蟋蟀们在这里弹琴。④翻开断砖来,有时会遇见蜈蚣;还有斑蝥,倘若用手指按住它的脊梁,便会啪的一声,从后窍喷出一阵烟雾。⑤何首乌藤和木莲藤缠络着,木莲有莲房一般的果实,何首乌有臃肿的根。⑥有人说,何首乌根是像人形的,吃了便可以成仙,我于是常常拔它起来,牵连不断地拔起来,也曾因此弄坏了泥墙,却从来没有见过有一块根像人样。如果不怕刺,还可以摘到覆盆子,像小珊瑚珠攒成的小球,又酸又甜,色味都比桑葚要好得远。 

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小题5:这段文字中哪句话可以概括百草园的特点?(2分)

小题6:选出对本段分析不正确的一项:(       )(3分)

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题型:完形填空
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  42   she asked me, “What if we    43   this a smile car wash?” I couldn’t hold back my tears and    44   her and the other kids to go outside the house and come up with    45    ideas. While I kept myself busy in drying the car, the gang walked up to me with a(n)  46  with beautiful images of smiles. They had “Free Car Wash” written on it and the    47    of their exercise was “smile”. It was pretty neat to see a team of kids ranging 5-11 years with the   48 to do something for others.
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题型:多项选择题

建筑材料防火技术应用应当遵循下列主要原则()。

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B、增强对构件的防火保护

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D、与电气线路或发热物体接触的材料、竖向管道井的材料必须采用不燃材料

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