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光电检测器的响应度与入射光波长无关
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  • 为了维护我国各族人民的团结,必须同时反对()两种倾向(A) 大民族主义 (B) 地方自治主义 (C) 地方民族主义 (D) 民族自立主义 (E) 大汉族主义毛泽东思想与中国特色社会主义理论体系
  • In the old days, divers used to go down into the sea looking for ships that had sunk, because they hoped to find gold and jewels. Now divers still search for valuable things in sunken ships, but they also try to bring to the surface the ships themselves, or parts of them. The value of different kinds of metals has increased greatly over the last twenty or thirty years and even though a ship has been under the sea for many years, it may be worth a great deal. One famous sunken ship is the "Lusitania", which sank off the southern coast of Ireland in 1915 with a loss of nearly, 1,500 lives. It has four huge propellers made of an expensive metal. Today each of those propellers is worth $ 300,000 or more. The ship lying on the sea-bed has been brought by a man called John Light. He paid about $ 1,200,000 for the whole ship. He hopes to bring up those propellers and sell them. He also hopes to sell other parts of the ship, when he has brought them to the surface, for about $ 600,000. (1)Divers today try to bring to the surface _ _ _ _ _ _ _ .(2分)A、gold and jewelsB、parts of shipsC、whole shipsD、all of the above(2)Diver try to bring up metals because _ _ _ _ _ _ _ _ .(2分)A、they have been in the sea for a long timeB、gold and jewels are not valuable thingsC、some kinds of metals are worth a lot of moneyD、it is easy to bring up metals(3)The word "surface" in the passage means the _ _ _ _ _ _ .(2分)A、marketB、airC、top of a liquidD、sea(4)John Light hopes that he may be able to sell all the parts of the "Lusitania" for about _ _ _ _ _ .(2分)A、$12,000B、$300,000C、$1,200,000D、$1,800,000(5)John Light bought the "Lusitania" _ _ _ _ _ _ _ .(2分)A、before 1915B、before it sankC、after it sankD、rafter they had brought up the propellers新发展英语综合教程(二)
  • (A)(B)(C)(D)工程制图
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