[单选题]
00.01: As a wave moves from one medium to a s/*p0qna lw)v:wd1k w uecond medium with a ddd;/ uzor/; nqifferent index of refraction which of the following wave properties woulo;/durz;d/qn d NEVER change?
A. frequency
B. wavelength
C. speed
D. angle
E. all will change
