《乘風破浪的姐姐》，無疑是這個夏天最火爆的綜藝。30個姐姐，有可愛型，有颯美款，有性感風，也有霸氣範兒，千人千面，各有各的迷人魅力。
屏幕外，還有很多沒參加節目的姐姐，也被網友們在線pick，呼聲很高。其中有位姐姐可謂獨佔鰲頭，她就是清冷優雅，總給人帶來意外之喜的「自律女神」韓雪。
膚白，貌美，大長腿，37歲的她仿佛被歲月格外優待，渾身上下發著光。這讓我想起了《聲臨其境》裡，她身穿一身藍色開叉旗袍，和賈靜雯、馬思純、徐帆同臺競技，真稱得上婀娜多姿，風情萬種。
看了韓雪我才知道，為什麼我們要保持自律，追求精緻生活。
想必大家都有所耳聞，韓雪是娛樂圈出了名的，按高標準嚴格要求自己的人。常年堅持精簡生活的韓雪，靠它在別人不經意間完成了彎道超車。利用零碎時間練習英語，變成一張口圈粉無數的英語達人。
說到學英語，大家是不是也正在全力備考即將來臨的大學英語四級考試呢，如果還沒有行動起來，那就要像韓雪一樣趕緊行動起來吧！下面小編就給大家介紹一篇英語四級閱讀理解文章，小編帶大家一起來熱熱身吧！
It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior.
So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans.
Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies.
Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies.
Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures.
The speed of sound in water is roughly one mile a second—slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.
藍鯨是海洋中最大的生物。由於商業捕鯨，藍鯨幾乎瀕臨滅絕，現在已被列為瀕危物種。給它安裝無線電裝置是困難的，而且視覺上的觀察太不可靠，不能對它的行為有真正的洞察。
因此，今年早些時候，生物學家很高興，因為在海軍的幫助下，他們能夠追蹤一隻特定的藍鯨43天，監測它的聲音。這之所以成為可能，是因為美國海軍以前的絕密水下監聽系統橫跨了整個海洋。
冷戰結束後，海軍開始分享並部分公開其建立了幾十年的全球水下監聽系統網絡，以追蹤潛在敵人的船隻，追蹤鯨魚只是這個令人興奮的新世界剛剛向民間科學家開放的一個例子。
地球科學家最近在一次新聞發布會上宣布,他們已經使用了系統密切監測深海火山噴發,他們計劃首次類似的研究。 其他科學家提議使用該網絡跟蹤洋流，測量海洋和全球溫度的變化。
聲音在水中的傳播速度大約是每秒1英裡，比在陸地上傳播慢，但比在空氣中傳播快。最重要的是 不同層次的海水可以充當聲音的通道，就像聽診器將病人胸部微弱的聲音傳到醫生耳朵時所做的那樣，將聲音集中起來。這種聚焦是海洋中即使是相對微弱的聲音，尤其是低頻聲音，也能傳播數千英裡的主要原因。
重點詞彙積累
track vt. 追蹤
endangered adj. 瀕臨滅絕的
attach vt. 使依附；貼上
monitor vt. 監控
device n. 裝置
span vt. 跨越
eruption n. 爆發
stethoscope n.聽診器
frequency n. 頻率
The passage is chiefly about ________.
A) an effort to protect an endangered marine species
B) the civilian use of a military detection system
C) the exposure of a U.S. Navy top-secret weapon
D) a new way to look into the behavior of blue whales
解題思路：
此題為主旨題，首先注意原文的第一段一般是整篇文章的背景信息交代，目的是更好地引出文章主要內容，所以主旨一般就是在文章中的第二段，根據第二段第一句話：So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds.不難看出這就是整篇文章的核心主旨內容其次抓住每個選項的核心關鍵詞，A選項是effort to protect species，B選項是civilian use ,C選項是exposure of weapon，D選項是way to look behavior of blue whales，通過分析選項得出正確答案為B。
The underwater listening system was originally designed ________.
A) to trace and locate enemy vessels
B) to monitor deep-sea volcanic eruptions
C) to study the movement of ocean currents
D) to replace the global radio communications network
此題為細節題，根據題目關鍵詞underwater listening system 定位到原文中as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies，得出正確選項為A。
The deep-sea listening system makes use of ________.
A) the sophisticated technology of focusing sounds under water
B) the capability of sound to travel at high speed
C) the unique property of layers of ocean water in transmitting sound
D) low-frequency sounds traveling across different layers of water
此題為細節題，原文中What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope does when it carries faint noises from a patient’s chest to a doctor’s ear.通過使用What is most important最高級的用法進行了強調，所以這是必考內容。根據這句話得出正確選項為C。
It can be inferred from the passage that ________.
A) new radio devices should be developed for tracking the endangered blue whales
B) blue whales are no longer endangered with the use of the new listening system
C) opinions differ as to whether civilian scientists should be allowed to use military technology
D) military technology has great potential in civilian use
此題為推斷題，根據整篇文章內容進行推斷，所以此題傾向於與文章主旨相關，A選項核心為new radio devices，B選項核心為blue whales，但是所說內容與原文相反，排除，C選項核心為scientists opinions differ, 文中未提及，排除，D選項核心為military technology和civilian use，本選項和文章主旨相呼應，因此正確選項為D。
Which of the following is true about the U.S. Navy underwater listening network?
A) It is now partly accessible to civilian scientists.
B) It has been replaced by a more advanced system.
C) It became useless to the military after the cold war.
D) It is indispensable in protecting endangered species
此題為細節題，根據題目中關鍵詞the U.S. Navy underwater listening network定位到原文中as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies這句話，其中注意副詞partly表示部分地意思，因為正確選項為A。
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