读一读下面的句子，选择相应的句子补全对话。 1.C 2.A 3.B 4.D
我想请教下工程上人月和人日有什么区别，怎么计算.比如说一个工程是1.5人日的工作量是什么意思？望指教。 人日也叫工日，就是一个人工干一天的工作量.计算方法用人数乘以天数.如3人干了2天，就算6人日；1.5人日指一个人做了一天半的工作量，或三个人做了半天的工作量.人月相似，只是以月为计算单位.
英语翻译 According to the engineer's evaluation，we need to design a suitable arc button for the KK models products.Due to the mold fee of about$10000，the development cycle is estimated to be about 3 months，so we want to confirm again whether you really interested in the arc button.We will complete the button-model as soon as possible to you to confirm.Please notedthat once confirmed，the shape and size of the button in the new development should not be modified.
