下表是世界主要工业国（区域）工业生产发展占世界份额表，对此表解读正确的是（    ）

①英国逐渐丧失“世界工厂”的地位  ②以美国为主导的资本主义世界体系形成  ③美国和德国迅速崛起  ④第二次工业革命冲击了原有的世界经济格局

测定电源的电动势和内电阻的实验U﹣I图象如图：

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根据短文，选择正确答案。

     An old tiger lives in the forest. He does not want to look for food now. He often tells other animals to bring him something to eat.

     He see a monkey and says, “I am hungry, Monkey. Go to the village and bring me a fat pig.”

  “Oh, Tiger,” says the monkey. “I cannot do that now. There is another tiger over there. He also wants a fat pig. He will not let me get anything for you to eat. I am afraid of him.”

   “What?” cries the old tiger?“Show me that tiger. I will talk to him.”

    “Come with me,” says the monkey.

     The monkey and the tiger get to a bridge over the river.

   “Now look down at the river,”says the monkey.

   “Do you see the head, the white teeth and the large green eyes of a tiger?”

   “Yes, I do.” Cries the old tiger, “I will eat him up”

     With these words, the tiger jumps into the water.