单项选择题

According to the passage, through which of the following does the energy released in the Sun pass be fore it becomes light

A．The x-ray part of the spectrum.
B．Electromagnetic space.
C．The solar surface.
D．Interplanetory space.
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单项选择题
It can be inferred from the passage that the Sun's light travels ______.
A．through solid objects in space
B．in many different directions
C．more slowly than scientists previously believed
D．further in summer than in winter
单项选择题
The passage indicates that, in comparision to radio waves, gamma waves ______.
A．produce louder sound
B．are less magnetic
C．do not form in the Sun's center
D．are not long
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