The output of light and heat Afrom the sun requires that some 600 Bmillion tons of hydrogen Cbe converted into helium Din the su

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问题 The output of light and heat Afrom the sun requires that some 600 Bmillion tons of hydrogen Cbe converted into helium Din the sun every second.

选项 A、 
B、 
C、 
D、 

答案A

解析 from改为of。light and heat of the sun,指太阳的光和热,表示所属关系。
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