摘要：7.5℃,9℃,18.5℃,-4℃
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完形填空 (共20小题；每小题1分，满分20分)
请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
Certainly dustmen prefer to be known as "Reuse Collection and Disposal Officers". You may think that this is rather 36 , and it is better to call a spade a spade. But dustmen can be as 37 as people of any other occupation, though we must 38 that their job is not a 39 one in the world. We often take dustmen for granted. Perhaps because they usually come very early in the morning, before most people are 40 .We are likely to forget their 41 .Our dustbins are 42 regularly, but we 43 stop to think about the men who do this. However, it is one of the most important jobs in the world, and when there are no dustmen to 44 the rubbish, the general 45 soon becomes aware that something is wrong. Recently, the dustmen of England went on strike for higher wages.
During the first few days it was regarded as a 46 .But when the first two weeks had passed, and the dustbins were overflowing in nearly every backyard in the country, the joke did not seem so 47 any more. 48 the strike continued, people could not 49 the hills of rubbish around their dustbins, and they looked for other places in which to 50 it. Even Leicester Square, in the heart of West End of London, was 51 high with plastic bags full of smelly rubbish. This was a（n） 52 attraction that the people of London were not at all 53 to see. Even when the strike was over, it took several weeks for the country to get cleaned up completely. Perhaps now the English people appreciate the work of 54 dustmen rather more 55 and won't take them for granted any more.
【小题6】.
【小题18】.
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请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
Certainly dustmen prefer to be known as "Reuse Collection and Disposal Officers". You may think that this is rather 36 , and it is better to call a spade a spade. But dustmen can be as 37 as people of any other occupation, though we must 38 that their job is not a 39 one in the world. We often take dustmen for granted. Perhaps because they usually come very early in the morning, before most people are 40 .We are likely to forget their 41 .Our dustbins are 42 regularly, but we 43 stop to think about the men who do this. However, it is one of the most important jobs in the world, and when there are no dustmen to 44 the rubbish, the general 45 soon becomes aware that something is wrong. Recently, the dustmen of England went on strike for higher wages.
During the first few days it was regarded as a 46 .But when the first two weeks had passed, and the dustbins were overflowing in nearly every backyard in the country, the joke did not seem so 47 any more. 48 the strike continued, people could not 49 the hills of rubbish around their dustbins, and they looked for other places in which to 50 it. Even Leicester Square, in the heart of West End of London, was 51 high with plastic bags full of smelly rubbish. This was a（n） 52 attraction that the people of London were not at all 53 to see. Even when the strike was over, it took several weeks for the country to get cleaned up completely. Perhaps now the English people appreciate the work of 54 dustmen rather more 55 and won't take them for granted any more.
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| A．disappointed | B．serious | C．nervous | D．happy |
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4、在物理课外小组的活动中，小刚同学利用如图，电路测滑动变阻器的功率．R1=9Ω，电源电压U不变，调节滑动变阻器的滑片P，得出数据如下表所示：
经过对实验数据的认真分析，可以知道：
（1）滑动变阻器功率的大小变化情况是
（2）滑动变阻器的滑片是从
（3）电源电压约为
（4）通过对本实验数据的分析，你会产生什么猜想？
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| 实验次数 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 电压表示数（V） | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 | 2.0 | 1.5 | 1.0 |
| 电流表示数（A） | 0.18 | 0.24 | 0.28 | 0.34 | 0.38 | 0.44 | 0.50 | 0.56 |
| 变阻器功率（W） | 0.81 | 0.96 | 0.98 | 1.02 | 0.95 | 0.88 | 0.75 | 0.56 |
经过对实验数据的认真分析，可以知道：（1）滑动变阻器功率的大小变化情况是
由小变大再变小
；（2）滑动变阻器的滑片是从
左
向右
滑动的；（3）电源电压约为
6
V；（结果取整数）（4）通过对本实验数据的分析，你会产生什么猜想？
滑动变阻器的阻值与定值电阻的阻值相等时，滑动变阻器的功率最大
．小丽在实验室中探究海波、花生油的凝固规律时，记录实验数据如下表所示．请回答下列问题．
（1）根据表中的实验数据可以判断：海波在凝固用了 min，在其凝固过程中继续放热且温度 ．（选填“升高”、“不变”或“降低”）
（2）花生油在降温过程中，观察发现：当油温下降到12℃时，花生油中产生一些絮状物，油变的浑浊；当油温由12℃下降到4℃的过程中，花生油中絮状物逐渐变多，最终花生油变成固态．根据实验数据及现象分析可知：花生油属于 ．（选填“晶体”或“非晶体”）
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| 冷却时间/min | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 海波的温度/℃ | 53 | 50 | 48 | 48 | 48 | 48 | 48 | 46 | 44 | 42 | 40 |
| 花生油的温度/℃ | 20 | 18 | 16 | 14 | 12 | 10 | 8 | 6 | 4 | 2 | 0 |
（2）花生油在降温过程中，观察发现：当油温下降到12℃时，花生油中产生一些絮状物，油变的浑浊；当油温由12℃下降到4℃的过程中，花生油中絮状物逐渐变多，最终花生油变成固态．根据实验数据及现象分析可知：花生油属于
为了研究物质的某种物理属性，同学们找来大小不同的蜡块和干松木做实验，得到的数据如下表所示．
（1）分析比较1、2、3、4或5、6、7、8，可得到“
（2）分析比较序号1、2、3、4和5、6、7、8，还可得出结论：
（3）物理学中将
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| 实验序号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 物质 | 蜡块 | 干松木 | ||||||
| 体积V/cm3 | 10 | 20 | 30 | 40 | 10 | 20 | 30 | 40 |
| 质量m/g | 9 | 18 | 27 | 36 | 5 | 10 | 15 | 20 |
同种物质
同种物质
，质量与体积成正比
正比
”的结论，请你简要说说怎样分析才能得到该结论：质量与体积的比值是一定的
质量与体积的比值是一定的
；（2）分析比较序号1、2、3、4和5、6、7、8，还可得出结论：
不同物质的质量与体积的比值不等
不同物质的质量与体积的比值不等
；（3）物理学中将
质量与体积的比值
质量与体积的比值
定义为密度，列举一个用同样方法定义的物理量路程与时间的比值叫速度
路程与时间的比值叫速度
．某光敏电阻阻值随光强变化关系如下表：〔“光强（E）”表示光强弱程度的物理量，单位为坎德拉（cd）〕
（1）将光敏电阻R 和定值电阻R0、电流表、电压表连成如图甲所示电路，电源电压恒为9V不变．闭合开关，若电流表的示数增大，表明光强在
（2）若某时刻电流表的示数为0.25A时，电压表的示数为3V，求：此时光敏电阻的阻值以及光敏电阻所在处的光强；通电1min R0上产生的热量．
（3）若用该光敏电阻制作成如图乙所示的电磁继电器来控制路灯L，要求当光照减弱到一定光强时，电磁继电器能接通路灯L，则图乙中电灯应接在
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| 光强E/cd | 1 | 2 | 3 | 4 | 5 | 6 |
| 光敏电阻R/Ω | 36 | 18 | 12 | 9 | 7.2 | 6 |
增大
增大
，电压表与电流表示数的比值将不变
不变
．（选填“增大”、“减小”或“不变”）．（2）若某时刻电流表的示数为0.25A时，电压表的示数为3V，求：此时光敏电阻的阻值以及光敏电阻所在处的光强；通电1min R0上产生的热量．
（3）若用该光敏电阻制作成如图乙所示的电磁继电器来控制路灯L，要求当光照减弱到一定光强时，电磁继电器能接通路灯L，则图乙中电灯应接在
AB
AB
（选填“AB”或“CD”）两端．