多项选择题

下列关于氢键的说法错误的是（）
A、氢键是化学键
B、氢键没有方向性
C、氢键没有饱和性
D、氢键的强弱和分子间作用力接近
E、氢键有方向性

你可能感兴趣的试题

单项选择题

日常称为鱼肉的一般为横纹肌，也叫骨骼肌。
A、正确
B、错误

单项选择题

In the context of managing performance in not for profit organisations, which of the following definitionsis incorrect?
A、Value for money means providing a service in a way which is economical, efficient and effective.
B、Economy means doing things cheaply: not spending 1.
C、Efficiency means doing things quickly: minimising the amount of time that is spent on a givenactivity.
D、Effectiveness means doing the right things: spending funds so as to achieve the organisation'sobjectives.