分析 當(dāng)天氣炎熱時(shí),你去湖邊或海邊,當(dāng)你靠近湖或海邊時(shí),你感覺(jué)很涼爽.為什么?太陽(yáng)使地球變熱,但它不能讓水變熱.雖然地表上空的空氣變熱,但是水面上方的空氣并不熱.地表上方的熱空氣上升,然后水上的冷空氣移動(dòng)并取代地表上方的熱空氣.當(dāng)你在湖或海洋附近,冷空氣移動(dòng)的時(shí)候你會(huì)感覺(jué)到它.你感覺(jué)到風(fēng),而且風(fēng)使你感覺(jué)涼爽.
當(dāng)然,科學(xué)家不能回答我們所有的問(wèn)題.如果我們問(wèn)"為什么海洋里充滿了鹽?"科學(xué)家會(huì)說(shuō)鹽來(lái)自于巖石.當(dāng)巖石變得非常熱或非常涼時(shí),它就會(huì)裂開,雨水就會(huì)落入裂縫.雨水就會(huì)把鹽帶入地表和河流.河流攜帶鹽進(jìn)入海洋.然后我們問(wèn)"海洋中的鹽發(fā)生了什么?海洋不會(huì)變得更咸."科學(xué)家們不確定這個(gè)問(wèn)題的答案.
關(guān)于我們的世界我們知道很多.但對(duì)許多問(wèn)題我們都沒(méi)有答案,我們很好奇.
解答 66-70 BABDB
66.B.文章主旨題.根據(jù)全文的內(nèi)容,主要講述的內(nèi)容是關(guān)于海洋的一些知識(shí),其中有些問(wèn)題科學(xué)家能夠幫我們解決,有些科學(xué)家不能解決,也就是scientists can explain many things,but not everything,科學(xué)家能給我們解釋很多問(wèn)題,但是并不能解決我們的所有問(wèn)題.
67.A.細(xì)節(jié)理解題.根據(jù)When you are near a lake or an ocean,you feel cool.Why?The sun makes the earth hot but it can not make the water very hot.Although the air over the earth becomes hot,the air over the water stays cool.The hot air over the earth goes up.Then the cool air over the water moves in and takes the place of the hot air.When it moves in,you feel the wind.And the wind makes you cool.太陽(yáng)使地球變熱,但它不能讓水變熱.雖然地表上空的空氣變熱,但是水面上方的空氣并不熱.地表上方的熱空氣上升,然后水上的冷空氣移動(dòng)并取代地表上方的熱空氣.當(dāng)你在湖或海洋附近,冷空氣移動(dòng)的時(shí)候你會(huì)感覺(jué)到它.你感覺(jué)到風(fēng),而且風(fēng)使你感覺(jué)涼爽.所以現(xiàn)在科學(xué)家已經(jīng)知道在夏天人們?cè)诤吇蚝_吀械經(jīng)鏊脑颍蔬xA.
68.B.細(xì)節(jié)理解題.根據(jù)When a rock gets very hot or very cool,it cracks(崩裂),and rain falls into the cracks.可知,當(dāng)巖石太熱或太涼時(shí)均會(huì)導(dǎo)致其崩裂,因此答案為B.
69.D.詞義推斷題.根據(jù)When you are near a lake or an ocean,you feel the cool air when it moves in.You feel the wind and the wind makes you cool.可知,當(dāng)它移動(dòng)的時(shí)候你會(huì)感覺(jué)到他,而再根據(jù)上一句The hot air over the earth goes up,then the cool air over the water moves in and takes the place of the hot air.地表上方的熱空氣上升,然后水上的冷空氣移動(dòng)并取代地表上方的熱空氣.因此這里的它,即it指代的是水面上方的冷空氣,即the cool air over the water.
70.B.推理判斷題.關(guān)于A選項(xiàng)的問(wèn)題,The reason why people feel cool when they are near a lake or an ocean in hot weather.文中已經(jīng)給出了解釋"The sun makes the earth hot,but it can not make the water hot.Though the air over the earth becomes hot,the air over the water stays cool.The hot air over the earth goes up,then the cool air over the water moves in and takes the place of the hot air.When you are near a lake or an ocean,you feel the cool air when it moves in.You feel the wind and the wind makes you cool."A正確;關(guān)于The reason why the ocean doesn't get saltier every year.這個(gè)問(wèn)題,文中已經(jīng)指明,科學(xué)家不能給我們答案,But then we ask"What happens to the salt in the ocean?The ocean does not saltier every year."scientists are not sure about the answer to the question.,因此B錯(cuò)誤;The reason why the water in the ocean is salty.這個(gè)問(wèn)題的答案文中也已經(jīng)指明,是由于巖石在過(guò)熱或過(guò)冷的條件下會(huì)崩裂,雨水將鹽帶入河流,最終匯入海洋,C正確;The reason why rocks crack.文中也已指明原因,When a rock gets very hot or very cold,it cracks 當(dāng)巖石太熱或太涼時(shí)均會(huì)導(dǎo)致其崩裂;故D對(duì).故選B
點(diǎn)評(píng) 本文旨在介紹海洋相關(guān)的知識(shí),從而引出我們迫切希望了解我們生存的環(huán)境.做題時(shí)要在理解好文意的基礎(chǔ)上,與題目有機(jī)的結(jié)合,從文章中找到相關(guān)細(xì)節(jié)性的句子與選項(xiàng)細(xì)細(xì)比對(duì),進(jìn)行選擇和推理判斷選出符合文章內(nèi)容的正確選項(xiàng).做題注意靈活,有時(shí)可采用排除法或直選法確定出最終答案.
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