赞题库-背景图

单项选择题

10. As time went by, what happened to this photo?
A、People had forgotten this photo.
B、It didn’t become a fond memory.
C、People still had interest in it.
D、People turned away this photo.

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热门试题

单项选择题煤的比热容是指单位质量的煤温度升高()时所吸收的热量，以J／(g•℃)为单位。

A.0.5℃
B.1℃
C.2℃
D.3℃

单项选择题把某些材料所具有的能使电能与机械相互转换的特性称为()。

A、波形变换
B、压电效应
C、折射
D、阻抗匹配