单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
The Sun pours the energy into spaces in the form of ______.

A．hydrogen atoms
B．light and heat
C．nucleus of atoms
D．helium atoms

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. The Sun pours the energy into spaces in the form of ______. 您的浏览器不支持 audio 元素。