单项选择题

How did scientists increase "the speed of their perceptions a thousand fold"

A．By analyzing photographs.
B．By observing a white cat in a dark room.
C．By dropping a cat from a greater height.
D．By studying Newton’s Laws of motion.

<上一题目录下一题>

热门试题

单项选择题

According to the passage, which is the most probable person to teach you to speak your own language

A．Your father.
B．Your mother.
C．Your soft-spoken female teacher.
D．None of the above.

单项选择题

Which of the following can be inferred about high - speed photography in the late 1800’s

A．It was a relatively new technology.
B．The necessary equipment was easy to obtain.
C．The resulting photographs are difficult to interpret.
D．It was not fast enough to provide new information.