[填空题]A summary of the physical and chemical nature of life must begin,
not on the Earth, but in the Sun, in fact, at the Sun’s very center. It is here
which is to be found the source of the energy that the Sun constantly pours 41 ______
out into space light and heat. This energy is librated at the center of 42 ______
the Sun as billions upon billions of nuclei of hydrogen atoms collide
with each other and fuse together to form nuclei of helium, and doing 43 ______
so, relieve some of the energy that is stored in the nuclei of atoms. 44 ______
The output of light and heat of the Sun requires that some 600 million
tons of hydrogen are converted into helium in the Sun every second. 45 ______
This the Sun has been doing for several thousands of millions of year.
The nuclear energy is released at the Sun’s center as high-energy
gamma radiation, a form of electromagnetic radiation like light and
radio waves, only of very m

[填空题]A summary of the physical and chemical nature of life must begin,
not on the Earth, but in the Sun; in fact, at the Sun’s very center. It is here
which is to be found the source of the energy that the Sun constantly pours 41. ______
out into space light and heat. This energy is librated at the center of 42. ______
the Sun as billions upon billions of nuclei of hydrogen atoms collide
with each other and fuse together to form nuclei of helium, and doing 43. ______
so, release out some of the energy that is stored in the nuclei of atoms. 44. ______
The output of light and heat of the Sun requires that some 600 million
tons of hydrogen are converted into helium in the Sun every second. 45. ______
This the Sun has been doing for several thousands of millions of years.
The nuclear energy is released at the Sun’s center as high-energy
gamma radiation, a form of electromagnetic radia