题目内容
( ) 运算电路可实现函数Y=aX1+bX2+cX3,a、b和c均小于零。
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____运算电路可将方波电压转换成三角波。
Directions: In this section, there is a passage with ten blanks. You are required to select one wordfor each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2with a single line through the center. You may not use any of the words in the bank more than once．Ships are often sunk in order to create underwater reefs (暗礁) perfect for scuba diving (水肺式潜泳) and preserving marine__26__. Turkish authorities have just sunk something a little different than a ship, and it wouldn’t normally ever touch water, an Airbus A300. The hollowed-out A300 was __27__of everything potentially harmful to the environment and sunk off the Aegean coast today. Not only will the sunken plane __28__ the perfect skeleton for artificial reef growth, but authorities hope this new underwater attraction will bring tourists to the area.The plane__29__ a total length of 54 meters, where experienced scuba divers will__30__ be able to venture through the cabin and around the plane’s __31__. Aydin Municipality bought the plane from a private company for just under US$100,000, but they hope to see a return on that__32__through the tourism industry. Tourism throughout Turkey is expected to fall this year as the country has been the __33__ of several deadly terrorist attacks. As far as sunken planes go, this Airbus A300 is the largest __34__ sunk aircraft ever.Taking a trip underwater and__35__ the inside of a sunken A300 would be quite an adventure, and that is exactly what Turkish authorities are hoping this attraction will make people think. Drawing in adventure seekers and experienced divers, this new artificial Airbus reef will be a scuba diver’s paradise (天堂).
People who go through the ________ (hard)of intensified training tend to improve their performance on stage.
Reggae music was __________ (popular) in the 1970s by Bob Marley, who was later remembered as “the Father of Reggae”.
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