“耳听清渭洗”是说的关于谁的典故？（）
A.周文王
B.蚩尤
C.许由
D.晁错
参考答案：C
Wolves are very ______: they can live in forests, on open plains, or in the snows of the Arctic.
A．adaptable
B．adoptable
C．available
D．accessible
怎样消除运行中阀门填料泄露？
