閱讀理解

(1)

A thermometer is used in the experiment for ________．

[　　]

A．

marking

B．

measuring

C．

freezing

D．

timing

(2)

When should the timing begin?

[　　]

A．

Before you label the plain water．

B．

After you finish stirring the salt water．

C．

When ice starts to form on water．

D．

As soon as both cups are in a freezer．

(3)

By doing this experiment, the writer intends to ________．

[　　]

A．

record the exact freezing point at which salt water turns frozen

B．

draw a conclusion that fresh and salt water freeze at the same time

C．

prove a guess that salt water is different from fresh water in freezing

D．

affect the time and temperature at which salt water freezes

答案：1．B;2．D;3．C;
解析：

(1)

考查推理判斷。根據(jù)操作步驟第1步中的第二句可知是使用它確保兩杯水的溫度相同，由此可判斷它的作用是“測(cè)量”。thermometer意為“溫度計(jì)”。

(2)

考查細(xì)節(jié)理解。根據(jù)操作步驟中的第4步可知此項(xiàng)正確。

(3)

　　解析：考查作者意圖。結(jié)合Conclusion中的內(nèi)容以及Hypothesis中的內(nèi)容可推斷此項(xiàng)正確。hypothesis意為“假設(shè)”。

　　文章大意：鹽能影響水的結(jié)冰時(shí)間和結(jié)冰溫度嗎?事實(shí)勝于雄辯，還是讓實(shí)驗(yàn)數(shù)據(jù)和實(shí)驗(yàn)結(jié)果來證明吧。


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