高等教育 / 大学英语1
(单选题) How does fire appear at first? ( )
A、 by rubbing two pieces of wood together
B、 by knocking two pieces of stone together
C、 by lightening
D、 by matches
A、 by rubbing two pieces of wood together
B、 by knocking two pieces of stone together
C、 by lightening
D、 by matches
参考答案: