在探究晶体熔化时温度的变化规锋实验中，某小组设计如图甲，乙所_爱下问搜题

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问题实验题

在探究晶体熔化时温度的变化规锋实验中，某小组设计如图甲，乙所示的两套实验方案．

(1)请分析估价两套实验方案．

(2)下表是某小组的测量数据．

时问／min	O	2	4	6	8	lO	12	13	16	18	20	22	24	26	28
温度／℃	33	36	40	38	46	48	48	48	48	48	49	50	5l	52	53

请根据表中的数据在图所示的坐标中绘出“温度一时间”的图像．该物质是___________（选填“晶体”或“非晶体”）．若是晶体其熔点是___________．

答案

（1）甲方案用水间接加热，固态受热均匀，但加热时间较长；乙方案加热时间较短，但固体受热不均匀，容易发生过热现象．所以甲方案较乙方案好一些．（2）如图；晶体；48℃．

分析：（1）甲中将固体放入试管中，然后在水中加热，这样受热比较均匀；乙图将固体放入烧杯中直接加热，这样加热会不均匀，而造成固体受热不均，会出现加热部分熔化，非加热部分温度还很低．

（2）根据表格中数据描点，并用平滑的曲线将各点连接起来．如图所示：

第5分钟温度偏低，说明此温度读数错误．由表格中数据知，该物质在熔化过程中保持48℃不变，所以该物质为晶体，熔点为48℃．

默写题

“腹有诗书气自华”，请你根据要求填空。（每空1分，共10分）

7、⑴李贺的《雁门太守行》从听觉和视觉的角度描写了这场惊心动魄的战斗的句子是：____， ___。

⑵《次北固山下》一诗中，描写时序交替，又赋有新事物必将代替旧事物哲理的诗句是：____，______。

⑶海水是皎洁无比的蔚蓝色, ___________________ ,偶有微风,只吹起了___________________,这更使照晒于初夏之太阳光之下的、金光灿烂的水面显得温秀可喜。

⑷《饮酒》中最能表现作者闲适生活的句子是____________________，_____________________。

⑸《天净沙·秋思》中点明主旨的句子是___________________，___________________。

完形填空

阅读下面短文，掌握其大意，然后从各题所给的四个选项中，选出最佳选项。
An old man had three children, all boys. When they had grown up, he called them together and told them that he was very __36__ and no longer able to provide, __37__ for himself .He ordered them to go out and bring him food and clothing.
The three brothers __38 __ , and after a very long while they came to a large__39__. They decided that once they got across they would __40__. The eldest told the youngest to take the middle road, and the second to go to the right, __41__ he himself would go to the left. Then, in a year’s time, they would __42__ to the same spot.
So they parted, and at the end of a year, as __43__, they found their way back to the riverside. The eldest asked the youngest what he had gotten during his travels, and the boy __44__: I have nothing but a __45__ . If you look into it, you can see all over the country, no matter how far away.”
When asked __46__ what he had gotten, the second brother replied : “Only a pair of sandals that are so full of __47__ that if one puts them on one can walk at once to any place in the country in one step.”
Then the eldest himself, said: “ I , __48__ , have obtained but little, a kind of medicine, that is all. But let us look into the mirror and see how father __49__.”
The youngest __50__ his mirror, and they all looked into it and saw that their father was already __51__.Then the elder said: “Let us __52__ home and see what we can do,” So the second brought out his sandals, and all three placed their feet inside them and , __53__ , they reached their father’s grave. Then the eldest took the__54__ out of his bag, and poured it over the grave. At once their father __55__, as if nothing had been the matter with him.
Now which of these three sons has performed the best?

D．turned around

D．immediately

D．passed away