Question

【題目】An Interesting Experiment

Put an ice cube(冰塊) from your fridge into a glass of water. 【1】 Thus, you can take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.

You may ask your friends to try to do that when you are having dinner together. 【2】 You must use salt when you carry out this experiment.

【3】 Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. 【4】 The cold ice cube will make the salt water freeze again.

After a minute or two you may raise the piece of string and with it you will raise your piece of ice!

This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. 【5】

A. If you don’t put enough salt, the water will freeze again.

B. The string must be at least 10 centimeters long.

C. First you put the string across the piece of ice.

D. We can learn a lot from this physical experiment.

E. But when it melts, it will lose heat.

F. You should have a piece of string 10 centimeters long.

G. There is a salt bottle on the table.

Answer 1

【答案】

【1】F

【2】G

【3】C

【4】E

【5】A

【解析】文章給我們介紹了一個(gè)鹽幫助冰融化，冰又會(huì)使鹽水再結(jié)冰的實(shí)驗(yàn)。

【1】F

考查對(duì)上下文的理解和推理判斷能力。上句講把從冰箱里拿出的冰塊放進(jìn)一杯水，根據(jù)下句提到的with the help of the string.需要用細(xì)繩，F(xiàn)項(xiàng)：你需要有一根10厘米長(zhǎng)的細(xì)繩，符合此處內(nèi)容，故選F.

【2】G

考查對(duì)上下文的理解和推理判斷能力。根據(jù)下句提到的You must use salt可知提到鹽，G項(xiàng)：桌上有一個(gè)放鹽的瓶子，與下句連接，故選G.

【3】C

考查對(duì)上下文的理解和推理判斷能力。與下句Then并列指排列順序，C項(xiàng)：首先把繩子放在冰上，與下句連接，故選C.

【4】E

考查對(duì)上下文的理解和推理判斷能力。撒上鹽之后冰塊開始融化，但當(dāng)它融化時(shí)會(huì)失去熱量，冰塊會(huì)使鹽水再結(jié)冰。此處講了一個(gè)道理，E項(xiàng)連接上下句，故選E.

【5】A

考查對(duì)上下文的理解和推理判斷能力。根據(jù)上面提到的冰塊會(huì)使鹽水再結(jié)冰的道理可知如果不放足夠多的鹽，水會(huì)重新結(jié)冰。A項(xiàng)表達(dá)了此內(nèi)容，故選A.