单项选择题

Which of the following statements is TRUE

A．We see all the colors that animals can see.
B．Sunlight contains all the colors.
C．Color blindness is due to cone problems.
D．Rods are not as sensitive as cones.

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热门试题

单项选择题

The rods of our eyes see ______.

A．colors
B．black and white
C．both colors and black and white
D．visible wavelength colors

单项选择题

The economic development of Yugoslavia is directly hindered by ______.

A．the competition among its republics
B．the conflicts between the ethnic groups
C．the absence of a large modernized port
D．the existence of four distinct languages