最新小学六年级比例尺练习题
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一、填空。
⑴比例尺分为()和()。
⑵在一幅地图上,用3厘米的线段表示18千米的实际距离,这幅地图的比例尺是()。
⑶一幢教学大楼平面图的比例尺是1/200,表示实际距离是图上距离的()倍。
⒉脑筋转转转,答案全会选。
⑴一个电子零件的实际长度是2毫米,画在图纸上的长度是4厘米,这张图纸的比例尺是()。
A. 1:20
B.20:1
C. 2:1
D.1:2
二、解决问题。
⑴在比例尺是1:6000000的地图上,量得重庆到上海的距离是24厘米,重庆到上海的实际距离是多少千米?
⑵在比例尺是1/1000的地图上,量得一间房屋地基长8厘米,宽5厘米。这间房屋实际的长和宽分别是多少?
⑴实际距离240千米,画在比例尺是1:8000000的地图上,应画多少厘米?
⑵一个长方形操场,长160米,宽120米。如果把它画在比例尺是1/4000的地图上,长和宽各应画多少厘米?
三、判断。
⑴实际距离一定比图上距离大。()
⑵在比例尺是10:1的图纸上,2厘米的线段表示零件实际长度是20厘米。()
四、灵活多变,解决问题。
1、在比例尺是1/5000的地图上,量得一所学校的平面图长6厘米,宽4厘米。这所学校实际占地面积是多少平方米?
2、下面是某学校教学楼的地基占地平面图,请量出图上的长和宽,再算出教学楼地基实际的长和宽和教学楼的占地面积。(图形显示不出,故给出图形信息长为3cm,宽为1.5cm,比例尺1:1500)
五、一题多变化,动脑解决它
1、在比例尺是1:6000000的地图上,量得南京到北京的距离是15厘米。如果把南京到北京的距离画在比例尺是1:5000000的地图上,应该画多少厘米?
2、在一幅地图上,用5厘米的距离表示实际距离1500千米。在这幅地图上量得A、B两地的距离是3.5厘米,A、B两地的实际距离是多少千米?一条640千米的高速公路,在这幅地图上是多少厘米?
六、身边数学
⒑在比例尺是1:5000000的地图上,量得沈阳和重庆两地相距6厘米。如果甲、乙两辆汽车同时从两地相对出发,甲车每小时行48千米,乙车每小时行42千米。几小时后两车能相遇?
Differences between Chinese and Western table manners With the development of global economy, cross-culture communication has become more and more frequent, and the differences between Chinese and western culture have become more obvious, especially the differences of table manners.
Arrangement of seat in China
In China, people used to use the number of the tables to define the size of banquet. In small banquets which have two tables, the table on the left
or farther to the portal is the top table. At bigger banquets that have three or more tables, the rules are much more complicated.
Generally, seats that closer to the top table take precedence. For example, on the wedding party, family members of the bride or the leaderships are arranged to the table that closest to the top table. Hosts show their reverences to the guests by arranging seats by this way. Seats at one table also have different meanings. In Chinese table manner, the seat opposite to the door is the honor seat, which is for chief guests or elders; the seats beside are the second honor seat which are for other guests; the seats that opposite to the honor seat are the inferior seat. Inferior seats are for the host and hostess.
So before the banquet, hosts should first invite the chief guest or elders to the honor seat, and then invite other guests to the second honor seat. Hosts sit down on the inferior seats after all the guests sit down.