探究影响液体蒸发快慢的因素: (1)联系生活实际进行猜想:(a)根据衣服晒在太阳

题型:实验题

问题:

探究影响液体蒸发快慢的因素:

(1)联系生活实际进行猜想:(a)根据衣服晒在太阳下比在阴凉处干得快,摊开晾晒比又叠着干得快,猜想液体蒸发快慢可能跟液体温度的高低、液体         的大小有关;(b)根据________________________________________,猜想液体蒸发快慢可能跟液体表面空气流动快慢有关;(c)根据在相同条件下,将水和酒精同时擦在手臂上,酒精更容易干,猜想液体蒸发快慢可能还与         有关。

(2)计与进行实验:小明同学对其中的一个猜想进行了如下实验:

如图所示,在两块相同的玻璃板上,分别滴一滴质量相等的酒精,通过观察图中情景可知,他探究的是酒精蒸发快慢与                是否有关.此实验过程中需控制酒精的     ___________________________相同.

(3)交流与评估:我们知道液体蒸发时要吸热,请你举一个应用蒸发吸热的事。

例:   ________________________________ .

考点:液化现象、方法及其应用汽化及汽化的特点
题型:实验题

阅读理解

     We walked in so quietly that the nurse at the desk didn't even lift her eyes from the book. Mum

pointed at a big chair by the door and I knew she wanted me to sit down. While I watched mouth

open in surprise,  Mum took off her hat and coat and gave them to me to hold. She walked quietly to

the small room by the lift and took out a wet mop. She pushed the mop past the desk and as the nurse

looked up, Mum nodded and said, "Very dirty floors. "

      "Yes, I'm glad they've finally decided to clean them, "the nurse answered. She looked at Mum

strangely and said, "But aren't you working late?"

    Mum just pushed harder, each swipe(拖一下)of the mop taking her farther and farther down the hall.

I watched until she was out of sight and the nurse had turned back to writing in the big book.

    After a long time Mum came back. Her eyes were shining. She quickly put the mop back and took my

hand. As we turned to go out of the door, Mum bowed politely to the nurse and said, "Thank you."

    Outside, Mum told me, "Dagmar is fine. No fever. "

    "You saw her, Mum?"

     "Of course. I told her about the hospital rules, and she will not expect us until tomorrow. Dad will stop worrying as well. It's a fine hospital. But such floors! A mop is no good. You need a brush."

1. When she took a mop from the small room what Mum really wanted to do was____.

A. to clean the floor  

B. to please the nurse

C. to see a patient  

D. to surprise the story-teller

2. When the nurse talked to Mum she thought Mum was a________

A. nurse  

B. visitor

C. patient  

D. cleaner

3. After reading the story what can we infer about the hospital?

A. It is a children's hospital. 

B. It has strict rules about visiting hours. 

C. The conditions there aren't very good.

D. The nurses and doctors there don't work hard.

4. From the text we know that Dagmar is most likely____________

A. the story-teller's sister   

B. Mum's friend

C. the story-teller's classmate

D. Dad's boss

5. Which of the following words best describes Mum?

A. strange

B. warm-hearted

C. clever  

D. hard-working

题型:实验题

下列语句中加粗词的意义相同的一项是  [ ]

A.①锦瑟无五十弦 ②东面而视,不见水

B.①不卢家有莫愁 ②桃花潭水深千尺,不汪伦送我情

C.①他生未卜此生 ②说鲈鱼堪脍,尽西风、季鹰归未

D.①此情待成追忆 ②潭中鱼百许头

题型:实验题

NK塑胶件银线接收标准()

A.只I级面不允许

B.只I,II级面不允许

C.I.II.III级面都不允许

D.以上均不是

题型:实验题

下列哪一项不属于漫画的作用()

A、夸张

B、教育

C、监督

D、宣传

题型:实验题

痰液涂片找癌细胞最好选用的染色法为()

A.Gram染色

B.抗酸染色

C.Wright染色

D.Papanicolaou染色

E.H-E染色

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