单词：open circulatory system
[网络] 开放式循环系统；开放循环系统；体腔为开放式循环
单词：open circulatory system 相关文章
This is Scientific Americans Sixty-second Science. Im Cynthia Graber. This will just take a minute. Poor old spleen, it never got the recognition it deserved. Until now. Scientists had known that the spleen is part of our immune systems. But it was c
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听力题目： 17.(A). Henry was startled by the dogs bark. (B). The dog barked because Henry was jumping. (C). Henry jumped over the dog. (D). The dog barked in spite of Henrys commands. 18.(A). He explained all about the circulatory system. (B). H
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WASHINGTON, Aug. 23 (Xinhua) -- Australian tennis player Lleyton Hewitt withdrew from the US Open on Tuesday due to a foot injury. The 30-year-old, winner of the US Open in 2001, was bothered by the foot problem the whole summer. Hewitt underwent sur
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BEIJING, Oct. 4 (Xinhua) -- World number one Caroline Wozniacki and third seed Vera Zvonareva on Tuesday both sailed through to the third round at the China Open, but followed different paths. Wozniacki needed only one hour and 20 minutes to outclass
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NEW YORk, Sept. 1 (Xinhua) -- Serena Williams and last year's French Open champion Francesca Schiavone played red hot matches in U.S. Open as Williams allowed only one game and Schiavone surrendered two in cuising into third round on Thursday. Willia
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They say Jan. 18 or Blue Monday is the most depressing day of the year, but they're wrong. The most depressing day of the year is today, because you're about to find out how and when you're most likely to die. 人们总说蓝色星期一，即1月18号
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