题目

阅读下面的短文,根据短文内容完成信息卡。Here is a story: A man sees a butterfly (蝴蝶). The butterfly tries to get out of its chrysalis (蛹). Feeling sorry for it, the man decides to help. He cuts the chrysalis and the butterfly comes out easily. Surprisingly enough, the butterfly is unable to fly. If the butterfly doesn’t struggle(挣扎；奋斗) to leave the chrysalis, it can’t fly! The struggle develops the energy in the butterfly which makes it fly. Similarly, the challenges of life bring out the best in young people and make the fly.When people are young, meeting 在“使用托盘天平和量筒测量某金属块密度”的实验中， (1)首先把托盘天平放在水平桌面上，将游码移到标尺左端零刻度线处，发现指针偏向分度盘的左侧，应该把平衡螺母向________(填“左”或“右”)调节，才能使天平平衡； (2)天平平衡后，把金属块放在左盘，用镊子向右盘加减砝码，直到天平再次平衡，此时砝码和游码的位置如图所示，金属块质量为________g； (3)用细线拴好金属块，放入盛有70 cm3水的量筒中，结果如图所示，该金属块的密度为________kg/m3．