轴瓦最普遍的失效形式是（）。
A．磨损
B．裂纹
C．腐蚀
D．穴蚀
参考答案：A
South Korean Star PSY’s “Gangnam style” video, ___, has set the Guinness World Record for the most “liked” video in Youtube history.
A．broken records
B．breaking records
C．to break records
D．being broken records
家具清洗之后，应（）窗户通风。
