您所在的当前位置：初中物理试题 >

平面镜成虚像的原因

> 小红站在平面镜前2m处照镜子，下面说法正确的是 A.小红的像到镜面的距离等于2m B.小红到她的像的距离等于2m C.小红越走近镜子，她的像就越大 D.在镜子后面放一块木板后就看不到小红的像了

问题：

发布时间：2022-07-10

小红站在平面镜前2m处照镜子，下面说法正确的是

A.小红的像到镜面的距离等于2m
B.小红到她的像的距离等于2m
C.小红越走近镜子，她的像就越大
D.在镜子后面放一块木板后就看不到小红的像了

参考答案：

提问用户：3b***eHB

可能感兴趣的题目：

1 下列各组离子在溶液中能大量共存的是 [ ] A．酸性溶液Na +、K +、MnO 4 -、Br - B．酸性溶液Fe 3+、NH 4 +、SCN -、NO 3 - C．碱性溶液Na +、K +、AlO 2 -、SO 4 2- D．碱性溶液Ba 2+、Na +、CO 3 2-、Cl -
2 It was last October ____ they finally came back to their hometown. A．when B．that C．what D．until
3 我国降水时间、空间分布都不均匀，下列地区年降水量最大的是 A.东南沿海地区 B.西北内陆 C.青藏高原 D.四川盆地
4 Please come and help me with this application from because I don’t know how to it. A．set about B．set out C．set up D．set aside
5 阅读理解。 One girl decided to study judo (柔道) although she had lost her left arm in a car accident. The girl began lessons with an old Japanese judo instructor. The girl was doing well. So she couldn"t understand why, after three months of training, the instructor had taught her only one move. "Instructor," the girl finally said, "Shouldn"t I be learning more moves?" "This is the only move you know, but this is the only move you"ll ever need to know," the instructor replied. Not quite understanding, but believing in her teacher, the girl kept training. Several months later, the instructor took the girl to her first tournament. Surprising herself, the girl easily won her first two matches. The third match proved to be more difficult, but after some time, her opponent became impatient and charged. The girl skillfully used her one move to win the match. Still amazed by her success, the girl was now in the finals. This time, her opponent was bigger, stronger and more experienced. For a while, the girl appeared to be overmatched. Concerned that the girl might get hurt, the referee called a time-out. She was about to stop the match when the instructor intervened (干预). "No," the instructor insisted, "Let her continue." Soon after the match restarted, her opponent made a serious mistake: she dropped her guard. Instantly, the girl used her move to pin her opponent. The girl had won the match and the tournament. She was the champion. On the way home, the girl and her teacher reviewed every move in each and every match. Then the girl gathered the courage to ask what was really on her mind. "Instructor, how did I win the tournament with only one move?" "You won for two reasons," the teacher answered. "First, you"ve almost mastered one of the most difficult throws in all of judo. Second, the only known defense for that move is for your opponent to grab your left arm." The girl"s biggest weakness had become her biggest strength. 1. What can we learn about the girl? A. She was disabled in an accident. B. She disliked judo training. C. She learnt several moves. D. She won the first two matches hard. 2. The underlined word "overmatched" probably means _____. A. impatient B. depressed C. defeated D. trapped 3. The girl won the championship because of _____. A. her bravery B. her skills C. her tricks D. her strength 4. Which of the following is probably the best title of the story? A. The Story of a Girl B. A Disabled Girl C. Defense Matters D. Weakness Becomes Strength
6 水平推力F 1和F 2分别作用于水平面上静止的a、b两物体上，两物体的质量相等．作用一段时间后撤去推力，物体将继续运动一段时间后停下来．两物体的v-t图象如图所示，图中线段AB ∥CD，则（　　） A．F1的冲量大于F2的冲量 B．F1的冲量小于F2的冲量 C．两物体受到的摩擦力大小相等 D．两物体受到的摩擦力大小不等
7 长江与黄河的共同流向是 A.自东向西 B.自北向南 C.自南向北 D.自西向东
8 已知函数 f(x)=2sin(ωx+ π 3 )，x∈R，若f（α）=-2，f（β）=2，且|α-β|的最小值等于 3 2 π，则正数ω的值为______；函数f（x）的单调递减区间为______．
9 I usually don’t wake up until my alarm _______ every morning. A．switches off B．gives up C．puts up D．goes off
10 设向量 a 的模等于4， a 与 b 的夹角为 5π 6 ，则 a 在方向 b 上的投影为（　　） A．2 3 B．-2 3 C．2 D．-2