软件设计中划分程序模块通常遵循的原则是要使各模块间的耦合性尽可能成为 ______。
参考答案：弱
The little boy was so careless with his spelling that she often_____ letters from words.
A．left out
B．left behind
C．left off
D．let alone
下列哪项是肌肉痉挛后不可用的处理方法？（）
A.牵引痉挛肌肉
B.保暖
C.可配合局部按摩
D.用力收缩痉挛肌肉
