当你拿第一枝玫瑰时,被刺扎了一下,你会快速缩回手,这属于____ 反射。于是你拿第二枝玫瑰时会很小心,不被扎到,这属于____ 反射(填条件反射或者非条件反射)
He turned from side to side, eyeing himself in the mirror with a serious, studied ______ that soon changed into a smile.
常温时,pH=14和pH=10的两种NaOH溶液等体积混合,所得溶液中c(H+)是( )