问题
选择题
关爱生命，从安全做起。在实验过程中，操作不规范也会威胁人身安全，下列操作正确的是( )
答案
答案：C
用望远镜直接观察太阳，容易伤害眼睛；闻气体的气味应用扇闻法；把水加到浓硫酸中容易造成酸液飞溅。故选C。
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关爱生命，从安全做起。在实验过程中，操作不规范也会威胁人身安全，下列操作正确的是( )
答案：C
用望远镜直接观察太阳，容易伤害眼睛；闻气体的气味应用扇闻法；把水加到浓硫酸中容易造成酸液飞溅。故选C。
Jim likes reading very much. One day, he wants to borrow a book from the . He goes there Jack. They can’t see librarians, only some robots (机器人) standing there. Then Jim says to one of , “Hey, give me a book.” But the robot work. “ is wrong with the robot?” he asks Jack. Jack tells him, “When you want something from somebody, you must say ‘ ’ first.” So Jim says, “Please me a book, Mr. Robot.” Then the robot brings him the book. But again, Jim can’t take the book out of the robot’s hand. Jack says, “You must say ‘Thank you’ before you take the book.” Jim says “Oh, thank you very much, Mr. Robot.” Then he gets the book he wants from the robot.
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