Light travels faster than sound. This means when we see lightning, we ___ hear the thunder later. A. always B. never C. sometimes D. seldom 相关知识点: 试题来源: 解析 A。本题考查对常识的理解。光的传播速度比声音快,所以当我们看到闪电时,总是会稍后听到雷声。B选项“never”从不;C选项“...
When light passes through a lens, it can be focused or spread out. This is due to ___. A. reflection B. refraction C. diffraction D. polarization 相关知识点: 试题来源: 解析 B。本题考查光的折射现象。光通过透镜时会被聚焦或散开,这是由于折射。reflection 是反射,diffraction 是衍射,polari...
When light passes through a prism, it splits into different colors. This phenomenon is called ___. A. reflection B. refraction C. diffraction D. dispersion 相关知识点: 试题来源: 解析 D。本题考查光学现象的英文词汇。“dispersion”意思是色散,光通过棱镜分成不同颜色的现象就是色散。A 选项“refl...
When light passes through a prism, it splits into different colors. This is called ___. A. dispersion B. diffraction C. interference D. polarization 相关知识点: 试题来源: 解析 A。光通过棱镜分成不同颜色被称为色散。选项 B 衍射是指波遇到障碍物时偏离原来直线传播的现象。选项 C 干涉是两列或...
And this can be where I hear you say those words I love you when stars align The sky is crystal clear The wind is all I hear The time is getting near When you're finally home A different side tonight The moon is on the rise The light it shines so bright Yeah because you're almos...
this is the way to victory when the lights go out in the city where will we go home where will we go when the lights who's gon' light the way when lights fade who's gon' light the way i don't know about you but i know about me and i can't see in the dark so i need a...
根据画线词所在句中的 Switch to bright light可知画线词所在句与上一句形成对比。因此,此处应该是指当光线变亮的时候,瞳孔就会自动收缩,故A项符合题意。10.B细节理解题。根据最后一段第三、四句可知:视杆细胞是非常高效的,只需要少量的光线就能触发它们;它们负责我们的夜视。由此可知,视杆细胞在夜间发挥重要...
(2)Light can shine through C.A.all plants and animalsB.our bodiesC.windows and glassesD.all of the above(3)The underlined word "block" means " A" in Chinese.A.阻挡B.制造C.释放D.装饰(4)From the passage,we know a girl's shadow would most likely be short ...
The frequency of the light changes during refraction D. Refraction only occurs with visible light 相关知识点: 试题来源: 解析 A。解析:当光线从空气进入水中时,这是从光疏介质进入光密介质,光线总是向法线偏折,这是折射现象的基本规律,A选项正确。光在从空气进入水中时速度会减小,B选项错误。光发生折射...
there is no single "dark side" of the moon. As the moon revolves around Earth, it is illuminated from varying angles by the sun — what we see when we look at the moon is reflected sunlight. On average, the moon rises about 50 minutes later each day, which means sometimes it rises ...