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一、填空题(30分)每空1分,把答案填写在题中横线上的空白处,不要求写计算过程. 1.家庭和物理实验室常用的温度计是利用液体的__来测量温度的. 2.光在真空中的速度是__米/秒,光在其他介质中的传播速度比在真空中的速度__. 发生雷电时,先看到闪电,后听到雷声,是由于__. 3.利用机械的时候,对人们有用的功叫__,人们不需要但又不得不做的功叫__,__叫总功.
1. Fill in the blank (30 points) for every 1 minute. Fill in the blanks on the horizontal line of the question and do not require the calculation process. 1. Thermometers commonly used in homes and physics laboratories are measured using liquid __. Temperature. 2. The speed of light in a vacuum is __m/s. Light travels in other media faster than it does in vacuum. __. When lightning occurs, see the lightning first, then hear the thunder. Because of the __. 3. When using machinery, people’s useful work called __, people do not need but have to do work called __, __ called total work.