2011年成考高起點(diǎn)英語考前練習(xí)題(21)
來源：育路教育網(wǎng)發(fā)布時間：2011-10-08
育路成人高考培訓(xùn)咨詢
幫助希望進(jìn)入名校的在職人員實現(xiàn)他們的本、�？拼髮W(xué)夢想
閱讀理解題
When water is heated until it boils， bubbles of gas appear and rise through the hot liquid. When an electric current passes through water in a process called electrolysis (電解)， bubbles of gas appear and rise through the liquid. Superficially (表面地)， the two events appear same.
If the gas from the boiling water is examined， its properties are found to be the same as those of the water， Thus， if the steam is cooled to room temperature， a liquid is formed which is indistinguishable from the original water. When， however， the gas from the electrolysis equipment is cooled to room temperature， it remains a gas rather than becoming a liquid. Nor will it， at zero degrees centigrade or below， turn to solid， as will the gas from boiling water， These two processes， boiling and electrolysis， have clearly resulted in products with quite different properties.
In boiling， the gas does not represent a new substance， but only a different state of the original substance. Electrolysis， on the other hand， has generated a product which is a new substance， or possibly a mixture of new substances. A change in state as represented by going from a liquid to a gas without the production of new substances in called a “physical change”。 However， when a process takes place that produces new substances， this is called a “chemical change” or a “chemical reaction”。 In a chemical reaction， the initial substances are replaced by a new set of substances or products.
( )1. Which of the following is the best title for this passage?
A. Electrolysis B. Physical and Chemical Changes
C. Different Types of Water D. Water Temperatures
( )2. At a temperature slightly above zero degrees centigrade， which of the following is true of gas produced by electrolysis?
A. It does not become liquid. B. It cannot be distinguished from water.
C. It becomes a solid. D. It expands greatly.
( )3. The passage is developed in the way of ________.
A. argumentation B. narration
C. comparison D. listing examples
業(yè)內(nèi)名師團(tuán)隊，班主任一對一服務(wù)，全面覆蓋考點(diǎn)，一次考試，保上名校。 ！
成人高考輔導(dǎo) 保過套餐 90%考點(diǎn)命中率 讓名校觸手可及！
課程名稱 |
課時 |
試聽 | 學(xué)費(fèi) |
報名 |
| 成考高起點(diǎn)語文(熱報) | 13周 |  |
￥200元 |  |
| 成考高起點(diǎn)數(shù)學(xué) | 13周 | |
￥200元 | |
| 成考高起點(diǎn)英語 | 13周 | |
￥200元 | |
| 成考高起點(diǎn)歷史地理 | 12周 | |
￥200元 | |
| 成考高起點(diǎn)物理化學(xué) | 12周 | |
￥200元 | |
| 網(wǎng)絡(luò)保過班(熱報) | 基礎(chǔ)班 +系統(tǒng)班 +串講班 | ￥1200元 | |
|
更多成考相關(guān)內(nèi)容
熱 2013成人高考高起點(diǎn)英語關(guān)鍵句型匯總
- 03-12·2013成考專升本語文記敘文部分資料匯總
- 03-12·2013成考專升本語文記敘文部分資料(八)
- 03-12·2013成考專升本語文記敘文部分資料(七)
- 03-12·2013成考專升本語文記敘文部分資料(六)
- 03-12·2013成考專升本語文記敘文部分資料(五)
- 03-12·2013成考專升本語文記敘文部分資料(四)
- 03-12·2013成考專升本語文記敘文部分資料(三)