練習(xí)：
1． What is Alvin?
A A research institute．
B A transporting vehicle．
C A submersible．
D A scientist．
2． Which of the following statements is NOT a fact about Alvin?
A h can carry explorers as deep as 6,500 meters．
B It has played a key role in various important undersea expeditions
C It was launched in the sixties of the twentieth century．
D It has been used for more than 40 years．
3． “．．．a(chǎn) world that is still full of mysteries” refers to
A the earth．
B out space．
C the ocean．
D Mars．
4． In what aspects are the new HOV and Alvin similar?
A Size．
B Speed．
C Capacity．
D Shape．
5． In what aspects are the new HOV and Alvin different?
A Offering better views．
B Speed．
C Size．
D Both A and B．
答案與題解：
1． C 短文第一段的第四、第五句提供了答案
2． A 文章第一段從第三句開始說，科學(xué)家正在研制一艘可將研究人員帶到6 500米深處的潛水裝置，而它將替代Alvin，因為Alvin只能潛到4 500米深處。A不是事實，所以是正確選擇。
3． C 本文討論探索海底世界的潛水裝置，所以“充滿神秘色彩的世界”指的就是海洋。
4． D 第三段的頭三個句子告訴我們，HOV和Alvin在體積上和容量上相似。所以D是正確選擇。
5． D 第三段最后兩句告訴我們，Alvin只有三個窗戶，而HOV有五個。最后一段告訴我們，兩艘潛水裝置的上下活動速度和行進速度有所差別。所以D是正確選擇。
1． What is Alvin?
A A research institute．
B A transporting vehicle．
C A submersible．
D A scientist．
2． Which of the following statements is NOT a fact about Alvin?
A h can carry explorers as deep as 6,500 meters．
B It has played a key role in various important undersea expeditions
C It was launched in the sixties of the twentieth century．
D It has been used for more than 40 years．
3． “．．．a(chǎn) world that is still full of mysteries” refers to
A the earth．
B out space．
C the ocean．
D Mars．
4． In what aspects are the new HOV and Alvin similar?
A Size．
B Speed．
C Capacity．
D Shape．
5． In what aspects are the new HOV and Alvin different?
A Offering better views．
B Speed．
C Size．
D Both A and B．
答案與題解：
1． C 短文第一段的第四、第五句提供了答案
2． A 文章第一段從第三句開始說，科學(xué)家正在研制一艘可將研究人員帶到6 500米深處的潛水裝置，而它將替代Alvin，因為Alvin只能潛到4 500米深處。A不是事實，所以是正確選擇。
3． C 本文討論探索海底世界的潛水裝置，所以“充滿神秘色彩的世界”指的就是海洋。
4． D 第三段的頭三個句子告訴我們，HOV和Alvin在體積上和容量上相似。所以D是正確選擇。
5． D 第三段最后兩句告訴我們，Alvin只有三個窗戶，而HOV有五個。最后一段告訴我們，兩艘潛水裝置的上下活動速度和行進速度有所差別。所以D是正確選擇。