ChaseDream

标题: 1.7 狗（更正+补充） [打印本页]

作者: cryydy 时间: 2022-1-7 22:06
标题: 1.7 狗（更正+补充）
Q：
1. P、Q是正整数，组成一个三位小数0.3PQ 问P？ 1: 1/3<0.3PQ<7/20 2: 0.3PQ<0.3QP
2. （更正）C1：（-2，0）圆心半径1的圆，c2:（1，3）圆心半径1的圆，问c1上距离c2距离最短的点的纵坐标二分之根号2
3. （补充）8台A机器生产8小时生产x件，8台B机器8小时生产y件，问4台A和3台B花12小时生产多少件？（x、y是两个数，记不清了所以用x、y表示，大概的数据为y为720000，x为880000/840000）

CR：一道原题如下
Medical research shows that recovering hospital patients heal better when they have more visitors, and when they can look out of their windows and see trees and parks rather than concrete and cars. In order to facilitate patient recovery, the Smithville hospital is therefore planning a new wing with innovations such as single rooms, a landscaped park, reduced-rate underground parking, and improved dining facilities for visitors.
Which of the following, if true; would most increase the chances of the plan's helping patients recover?
(A) Hospital occupancy rates are somewhat higher for single rooms than for multiple-bed rooms.
(B) A number of agencies provide free art materials and lessons for hospital patients in recovery.
(C) Friends and relatives are more likely to visit patients in single rooms than in multiple-bed rooms.
(D) If patients have slightly longer hospital stays, the extra cost of creating a pleasing environment can be recovered in one year.
(E) The quality of hospital food has been shown to have an effect on healing rates in patients.

awa：medical公司去年利润增长7%，历史最高，但认为还有增长空间，因为公司的entertainment costs高于行业平均水平，所以削减dining cost和entertainment expense可以进一步提高利润，成为leadership in industry

作者: 长丝弓 时间: 2022-1-7 22:26
感谢分享！

作者: Paul_Wilhelm 时间: 2022-1-7 22:32
感谢分享！

作者: cyberkitty 时间: 2022-1-7 23:18
感谢分享！

作者: huaxing 时间: 2022-1-8 15:40
非常感谢分享。第一题选E？

作者: remaker1111 时间: 2022-1-8 17:33
感谢分享，想问一下第二题的解法

作者: huaxing 时间: 2022-1-12 17:28

remaker1111 发表于 2022-1-8 17:33
感谢分享，想问一下第二题的解法

到C2距离最短就是圆心连线和C1交点，然后用相似三角形可以求得高。

作者: yaffashop 时间: 2022-1-14 11:56

huaxing 发表于 2022-1-8 15:40
非常感谢分享。第一题选E？

同意！

作者: wzy2007 时间: 2022-1-14 16:10

huaxing 发表于 2022-1-8 15:40
非常感谢分享。第一题选E？

我选的也是E。请确认？

作者: wzy2007 时间: 2022-1-14 16:13
第三题答案是 (12x+9y)/16吗？谢啦！

作者: 11335577 时间: 2022-1-16 11:45

wzy2007 发表于 2022-1-14 16:13
第三题答案是 (12x+9y)/16吗？谢啦！

我算的是这个

作者: wzy2007 时间: 2022-1-16 12:49

11335577 发表于 2022-1-16 11:45
我算的是这个

Super! Thank you!

欢迎光临 ChaseDream (https://forum.chasedream.com/)