有人作了如下的实验：

A实验：取活的禽流感病毒注射在一只鸡的体内，不久，此鸡死亡．

B实验：取灭活的禽流感病毒注射在另一只鸡的体内，经过几周后，让此鸡的体内产生抗体，然后，再取活的禽流感病毒注射在它的体内，结果它存活下来．

据上述实验回答：

完形填空

    I bought a jasmine plant for my office. When I bought it, I was told it would bloom and the sweet smell would 1my office. I had the plant for two 2, and every day I looked at it, but there weren't any 3 or pleasant smell. I was not happy,4 I gave the plant to my friend Linda.

    One day, 5 friend Mary called and invited me to her office. When I6, her jasmine flowers surprised me. I reached 7to touch the flowers. Mary cut some and gave them to me. I couldn't help 8 them. Surrounded by the sweet smell of only a handful of these flowers, I suddenly understood9  Mary bought her plant the same time I did. It took a year for her jasmine to bloom. I was so impatient for mine to bloom; regretfully, I 10 my jasmine.       

    In a way my life is like the jasmine plant. I need to be 11 and let things happen.  Last Sunday Linda told me that she was going abroad the next week. Before she left, she 12 the plant to me. This time I am going to wait. I have learned that 13 we want something in our life, we have to be patient. I am 14 learning to have that patience to wait for 15 jasmine to bloom.

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国产大片《南京！南京！》既掀起了人们的观看潮和评论热潮，也将中国对侵华历史、战争与和平的思考推向深入。该影片反映出我国民族精神的核心是（  ）