Firstly, the problems are not obvious to the designers.
Secondly, there are too many features in a machine.
Thirdly, it is too late for people find the products difficult to use when they are finished.
Finally, the manufacturers do not have the motivation to improve their for the convenience of the customers when the products sell well.
深层原因:Some manufactures say they concentrate on providing a wide range of features rather than on making the machines easy to use. It is not true.
得出结论:Good design practice is a mixture of specific procedures and general principles.
知道了类似的文章结构特点,就可以据此来进行考题预测。比如,我们看出了该篇文章属于这种结构类型,就能判断出几个问题中肯定有一个要问原因,还有可能要出现推断题。