单项选择题
A．the same action B．two separate actions C．two actions carried on entirely by eyes D．several actions that take place at different times
A．How We See B．Leaning about Our Minds through Science C．What Psychologists Perceive D．How to Become an Experimental Psychologist
A．in our eyes B．only when we think very hard about something C．only under the direction of a psychologist D．in every person's mind