题目

阅读下面材料, 根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。'Usual boring day!' This would be the answer from Roman if somebody asked him how his day was. These days he found everything boring, nothing excited him.One day he was lying in his room as usual. Suddenly light went off. His room was rather hot without an air conditioner. Though he did not want to leave his room, he had to. Unwillingly, he left his room and came to living room. Living room was slightly cool as it had two huge windows.His young brother 小明想测量大米的密度，但由于大米容易吸水，导致体积明显变化，因此用排水的方法测量大米的体积是不合理的。于是小明进行了如下实验和思考。实验一：按图甲和图乙的方法分别测量大米的质量和体积，由此计算出大米的密度。小明思考：能否用排空气的方法测量大米的体积呢？他设想将大米与空气密封在一个注射器内，只要测出注射器内空气和大米的总体积及空气的体积，其差值就是大米的体积。但如何测出空气的体积呢？查阅资料得知：温度不变时，一定质量气体的体积与其压强的乘积是定值。于是进行了实验二：称取5克大米并装入注射器内（如图丙），从注射器的刻度上读出大米和空气的总体积，通过压强传感器测出此时注射器内空气压强为P;而后将注射器内的空气缓慢压缩，当空气压强增大为2P时，再读出此时的总体积（压缩过程中大米的体积、空气的温度均不变），整理相关数据记录如表。（1）使用托盘天平称取5克大米。称量过程中发现天平指针偏向右边（如图甲），接下来小明应如何操作？________ （2）由于米粒间存在较大间隙，按图乙的方式用量简直接测量大米体积，则会导致测得的体积值偏________ （3）由实验二测得大米的密度为________ 克／厘米3。（计算结果精确到0.01）