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B Laboratory work is your chance to learn science first hand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson. LABORATORY RULES Throughout the lesson l Do not enter the science lab without the teacher’s permission. l No food or drinks are to be allowed in the science lab. Before the Experiment l Read all instructions carefully before every experiment. l Prepare all apparatus(仪器)and arrange them so that you will not knock them over while doing the experiment. During the Experiment l If you are unsure of how to use any apparatus or how to operate, you’re your teacher for help. l Never smell or taste chemicals unless your teacher gives permission. After the Experiment l Wash all apparatus after use and return them to the places where they were. l Throw waste materials in proper waste baskets. First Aid l Report all accidents to your teacher immediately. l If you spill(溅出)any chemicals you’re your body or clothing, wash with plenty of water and report to your teacher. 61. Your teacher will probably tell you the rules above _____ the first lab lesson. A. before B. since C. during D. after 62. Before every experiment, you should_____. A. taste the chemicals first B. clean all the apparatus C. read all instructions carefully D. report all the accidents to the teacher 63. When you are not sure how to use all apparatus, _____. A. try them on your own B. read the rules carefully C. ask your teacher for help D. put them back 64. It is clear that you can _____. A. bring food into the lab B. enter the lab anytime C. smell chemicals as you like D. learn science directly in the lab 65. If you get chemicals on the clothing, you can find ways to solve it in the part _____. A. Before the Experiment B. First Aid C. During the Experiment D. After the Experiment C Once upon a time, a young man was standing in the middle of the town announcing that he had the most beautiful heart in the world. A large crowd gathered, and they all praised his heart for it was perfect. Suddenly, an old man appeared and said, “Why, your heart is not as beautiful as mine.” The old man’s heart was full of scars(伤疤).Some pieces of his heart were removed and some pieces from other people were put in, but they didn’t fit quite right. So there were several jagged(锯齿状的)edges. In fact, there were still some holes in his heart where the pieces were missing. The young man laughed, “Comparing yours with mine, mine is perfect and yours is a mess.” “Yes,” said the old man. “But, every scar shows that I took out a piece of my heart and gave it to a person, and often he gave me a piece of his heart in return.” “Why do you have some jagged edges in your heart?” asked the young man. “Because the shapes of the pieces weren’t the same.” “Then the holes?” “Sometimes I gave pieces of my heart away, and the other person hasn’t given back a piece of his, so…but I don’t care.” “How come?” “They remind me of the love we shared.” The young man was deeply moved. He walked up to the old man, took a piece of his heart out and gave it to the old man. The old man placed it in his heart, then took a piece from his old scarred heart and placed it in the wound(伤口) in the young man’s heart. It fitted, but not perfectly, as there were some jagged edges. The young man looked at his heart, not perfect any more but more beautiful than ever. How sad it must be to go through life with a whole untouched heart! 66. The young man stood in the town to_____. A. meet the old man B. compare his heart with others’ C. show his beautiful heart D. give pieces of his heart to others 67. It’s clear that the old man was _____. A. a silly man B. a humorous man C. a well-known man D. a kind-hearted man 68. We learn from the story that in the end the young man was _____. A. lost B. moved C. hurt D. untouched 69. The old man said“…but I don’t care” means_____. A. he didn’t expect others’ return B. he didn’t feel pain C. he didn’t think it serious D. he cared nothing 70. We can get more beautiful hearts by sharing _____ A. ideas B. scars C. love D. beauty |