什么是风鼓？
参考答案：风鼓在汽车术语上有好几种意思，例如空气过滤器的外壳，真空伺服刹车的伺服助力器，或重型货车的压缩空气储藏缸都有人称之为风鼓。
The promised wage increase is being held back while it is examined by the government to see if it is greater than the law allows.
A．dismissed
B．delayed
C．neglected
D．rejected
适当过度学习能促进知识保持，研究表明，最佳效果的过度学习是学习熟练程度达到( )。
A．130%
B．140%
C．150%
D．160%
