在甲所示的电路中，闭合开关S后，电压表的示数为2V，两个电流表的指针指在图乙所示的同一位置．则电灯L₁中的电流I₁=____A，电灯L₁电阻为____Ω，电灯L₂的电流为I₂=____A，电灯L₁消耗的电功率P₁与L₂消耗的电功率P₂之比____．

下图表示反应X(g) +4Y(g) 5Z(g) ，在某温度时X的浓度随时间变化的 曲线：                                                     (    )                                               
 
下列有关该反应的描述正确的是                                               

在遗传信息的传递过程中，不可能发生的是

下列实验操作正确的是（   ）

根据短文内容的理解，选择正确答案。   

    In films, spies(间谍) are lucky people. They are smart and adventurous. But a real spy's life is not that exciting. They must live a life of lies. Their work is dangerous and they may have to pay for it with their lives. American spy Nathan Hale (1755-1776) was one of these people.

    Why does someone want to be a spy? Some do it for their country. Some for money. Some just love it. Nathan Hale became a spy for the first reason. He lived during the American Revolution (革命). He and his people fought the British army.

    In 1774, Hale joined the American army. Before that, he was a school teacher. Two years later, he chose to be a spy. He had to get information from the British army. He went to the city where the British army was staying. He told them that he was a school teacher and wanted to find a new job. As a young spy, Hale didn't have enough experience. He had told his secret to somebody else. But that person sold him out to the British army. He tried to get information for the American army. Hale finally got something important and decided to go back. He hid some papers in his boots. He went to the river bank and waited for a boat to pick him up. However, British soldiers caught Hale at the river bank and found the papers in his boots.

    Hale died on Sept 22, 1776. His final words were: "I only regret(后悔) I have but one life to lose for my country." He died at the age of 21.