试题与答案

Travel can teach kids more t小题1:a textbo

题型:完形填空

题目:

Travel can teach kids more  t 小题1: a textbook. Travelling with kids is good  f  小题2: them. They can find new interests. Travel makes information alive for kids and makes it much more exciting than studying textbooks or d 小题3:  experiments in the lab. While travelling, they learn how to deal with new situations, and communicate with other people. They learn patience, because sometimes it  t  小题4:  a long time to get to some exciting or interesting places.

I've been travelling s   小题5:    I was seven years old. For me, to stop t   小题6:    would be like taking something a  小题7:   from my soul(灵魂).  I can't live  w  小题8:      travelling and I won't be who I am if I don't travel. Some people think it's  h 小题9:   to travel after having kids. But in my opinion, when people become parents, it doesn't  m  小题10:   they can’t travel any more.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:3.患者下肢血压低于上肢血压,考虑为主动脉狭窄,狭窄以上血液灌注好,血压高,狭窄以下灌注差,血压低。

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题型:实验题

某兴趣小组同学对实验室制取氧气的条件进行如下探究实验.

(1)为探究催化剂的种类对氯酸钾分解速度的影响,甲设计以下对比试验:

I.将3.0gKClO3与1.0gMnO2均匀混合加热

II.将xgKClO3与1.0gCuO均匀混合加热

在相同温度下,比较两组实验产生O2的快慢.

①II中x的值为      

②若要证明CuO能作为KClO3分解的催化剂,则还要证明在化学反应前后CuO的           都不改变.

(2)乙探究了影响双氧水分解速度的某种因素,实验数据记录如表:

 双氧水的质量双氧水的浓度MnO2的质量相同时间内产生O2的体积
I50.0g1%0.1g9mL
II50.0g2%0.1g16mL
III50.0g4%0.1g31mL

①若用上述装置测生成氧气的体积,则用图    (填“a”“b”或“c”)

②实验结论:在相同条件下,          ,双氧水分解得快.

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