题目

Hangzhou is famous _______ producing silk in China. A．fromB．atC．inD．for 答案：D解析:be famous for固定搭配 因…而著名。提一桶水上楼，这时手臂上肱二头肌和肱三头肌的状态分别是A．收缩，收缩      B．收缩，舒张     C．舒张，收缩      D．舒张，舒张