C,15.C,16.A,17.C,18.A,19.B,20.D,21.C,22.B,23.C,24.略,25.略,26.略,27.(1)酒精温度计.因为酒精的凝固点低,(2)水银温度.水银的沸点高于水——青夏教育精英家教网—

摘要：C,15.C,16.A,17.C,18.A,19.B,20.D,21.C,22.B,23.C,24.略,25.略,26.略,27.(1)酒精温度计.因为酒精的凝固点低,(2)水银温度.水银的沸点高于水的沸点.(3)水银温度计的精确度更高一些.因为它的比热容小.变化相同的温度所吸收或放出的热量较少,28.略,29.50车次,30.(1)103Kg/m3,(2)m1=4.9g.m2=42.9g(3)A

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在研究电阻的大小与哪些因素有关时，小明猜想电阻与电压、电流有关，小李猜想电阻与导体的长度、横截面积有关。他们设计了如图18所示的电路，选用同种材料制成的不同导体、若干节干电池及其他必要器材进行实验。

(1)在设计电路时，小明认为还需在M、N两端并联一个电压表才能正确测出导体两端的电压；小李认为干电池的电压是已知的，所以实验中不需要电压表；经讨论后他们达成了共识并完成了实验。你认为 (13) (选填“小明”或“小李”)的观点是正确的。

(2)两位同学正确连接电路，并将实验测得数据记录在表一、表二和表三中。

表一导体A 长度0.4米横截面积0.3毫米²				表二导体B 长度1.2米横截面积0.3毫米²				表三导体C 长度1.5米横截面积0.3毫米²
实验序号	1	2	3	实验序号	4	5	6	实验序号	7	8	9
U(V)	1.2	2.4	3.6	U(V)	2.4	3.6	4.8	U(V)	1.5	3.0	4.5
I(A)	0.30	0.60	0.90	I(A)	0.20	0.30	0.40	I(A)	0.10	0.20	0.30

分析比较表一、表二、表三中的数据，可判断 (14) (选填“小明”或“小李”)的猜想是错误的。

分析比较表一和表二和表三中的数据，可初步得出：_____________________________ 　　　　　　　　　　　　　　(15)　　　　　　　　　　　　　　。

(3)为了在表三的基础上继续研究导体的电阻与导体横截面积的关系，请你在表四中填写需选用这种材料制成的导体还需满足的条件。 (16)

小明认为在后续实验中，D、E两端的电压必须与表三中的电压值相同；小李认为在后续实验中，通过D、E的电流必须与表三中的电流值相同。请你判断：小明的观点是 (17) 的，小李的观点是 (18) 的。(均选填“正确”或“错误”)

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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.

某小组同学探究“浸在水中时，物体所受浮力的大小”。

① 首先，他们进行“比一比，谁的小船货物装得多”的活动，装载货物前后的实验现象如图所示。请你仔细观察、比较图（a）和（b），并简要描述相关现象：（15）。

由此，三位同学提出了不同的猜想A、B和C。

猜想A：浮力的大小跟物体浸入水中的深度有关。

猜想B：浮力的大小跟物体排开水的多少有关。

猜想C：浮力的大小跟物体所受重力的大小有关。

② 接着，该小组同学利用弹簧测力计、溢水杯、小桶（不计重力）、水等器材进行实验。他们先在可密封的圆柱体内装一些小铅粒，然后用细线将圆柱体悬挂在测力计下。当此圆柱体分别在空气中和水中不同的深度处保持静止时，测力计的示数和小桶中的水量如图所示。他们通过思考图中“测力计示数变化的原因”，得到浮力测量的方法。

根据图（c）和（d）所示的测力计示数、小桶中水量等变化情况，可排除猜想（16）

（选填“A”、“B”或“C”）；

在猜想（17）的基础上（选填“A”、“B”或“C”），进一步分析并形成假设D：物体在水中所受浮力的大小等于（18）。