(IG)(CE)
An office block has three basement levels(-1,-2 and-3),a ground floor(0)and 15 floors above the ground floor(1 to 15).Where willthe lift be in the following situations?
a Starts on the ground floor and goes down one floor then up five?
b Starts on level-3 and goes up ten floors?
c Starts on floor 12 and goes down 13 floors?
d Starts on floor 15 and goes down 17 floors?
e Starts on level-2,goes up seven floors and then down eight?
一栋办公楼有三个地下层(-1、-2 和 -3)、一个地面层(0)以及地面层以上的 15 层(1 至 15)。在以下情况下,电梯会位于何处?
a 从地面层出发,先下行一层,然后上行五层?
b 从-3层出发,上行十层?
c 从12层出发,下行13层?
d 从15层出发,下行17层?
e 从-2层出发,上行七层,然后下行八层?



