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一、填空(每空1分,共26分)1.声音是由于物体______产生的;声音在15℃的空气中传播速度约为_____米/秒.2.光在同一种均匀物质中是沿________传播的;在_______中光传播得最快.3.一节干电池的电压是________伏;在家庭电路中,可以用_______来辨别零线与火线.4.改变物体内能的方式有_______和_____两种.5.物理学中规定:_________电荷定向移动方向为电流的方向;小磁针在磁场中静止时_______极所指的方向为该点的磁场方向.6.1个标准大气压的值等于_________帕,第一个用实验方法测出大气压数值的科学家是_________.7.人立于平面镜前l米处,这个人在镜子里的像离镜面的距离是________米.
First, fill in the blanks (1 point for every space, total 26 points) 1. The sound is due to the object ______; the speed of sound propagation in the air at 15°C is approximately _____ meters/second. The material is propagated along ________; in _______ the light propagates the fastest. 3. The voltage of a dry cell is ________ volts; in the home circuit, _______ can be used to identify the zero line and FireWire. .4. There are two ways to change the internal energy of an object: _______ and _____. 5. In physics, it is stipulated that: _________ The orientation direction of charge is the direction of the current; The direction of the finger is the direction of the magnetic field at that point. The value of 6.1 standard atmospheres is equal to _________pa. The first scientist to measure the atmospheric pressure numerically using an experimental method is _________.7. The person is standing in front of the plane mirror at l meters. The distance from the mirror in the mirror is ________ meters.