在光电效应实验中,如果保持入射光的频率不变(超过红限)而增加光强,则随着增加的是( )
A. 饱和光电流
B. 光电子的最大初动能
C. 光电子的能量
D. 遏止电势差
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关于辐射,下列几种表述中哪个是正确?( )
A. 只有高温物体才有辐射
B. 黑体辐射能量随温度的升高呈线性关系
C. 黑体辐出度峰值对应的波长随温度的升高而增大
D. 任何物体都有辐射
若f(x)g(x)=f(x)h(x),则g(x)=h(x)
A. 对
B. 错
What do effective readers do?
A. read phrase by phrase, rather than word by word.
B. concentrate on the important bits, skim the rest, and skip the insignificant parts.
C. use different speeds and strategies for different reading tasks.
D. guess the meaning of new words from the context, or ignore them.
E. perceive the information in the target language rather than mentally translate.
F. have and use background information to help understand the text.
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