单选题：请回答（27）题。
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In the process, the light energy converts to heat energy.
In the process, the light energy converts to heat energy.A．reduces B．changes C．l
A. who B. where C. when D. which
A. who B. where C. when D. which
造成货运事故的原因可能是（ ）。
造成货运事故的原因可能是（ ）。
In Ethan Sims' study, the subjects were asked to
In Ethan Sims' study, the subjects were asked toA．eat as much as they coul B．bat
商业机构对商业机构的电子商务，简称为（ ）。
商业机构对商业机构的电子商务，简称为（ ）。