【单选题】下列说法中不正确的是 [ ]
C.
分子间氢键的形成除使物质的熔沸点升高外,对物质的溶解度、硬度等也有影响
D.
氢键是一种特殊的化学键,它广泛地存在于自然界中
【单选题】关于血红蛋白生理变化的描述,下列叙述错误的是
D.
高山地区居民和登山运动员因缺氧刺激使Hb高于正常
【单选题】It is unfortunate that now violence and cartoons ______ the most distinctive characteristic of children's programs.
【单选题】In discussing the marketing concept, the author focuses on ______.
A.
its main characteristic
C.
its possible consequence
【单选题】It is unfortunate that now violence and cartoons ______ the most distinctive characteristic of children's programs.
【单选题】Accuracy is ______ to the programing of computers.
【单选题】下列说法不正确的是
C.
“水的分解温度远高于其沸点的事实”能说明分子间作用力比化学键弱
D.
氢键是一种特殊的化学键,它广泛地存在于自然界中
【判断题】氢键是一种不同于分子间作用力的特殊化学键