Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be read at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be read at normal speed again and during this time you should check your work. You will then be given 2 minutes to check through your work once
Please write the whole passage on ANSWER SHEET TWO.

计算整体地面面层工程量时，应扣除凸出地面的构筑物、设备基础、室内铁道、地沟等所占面积。