1con vịt đi trước 1 con vịt đi sau 1con vịt đi giữa. hỏi có mấy con vịt

EZ: có 3 con

Da Lat lies on Lam Vien plateau, in the Central Highland province of Lam Dong. 300 kilometers north of Ho Chi Minh City. Da Lat is a well-known city  attracting all the people who have been there once. Da Lat is known as a city of pine trees, waterfalls and flowers. Da Lat is described as a forest of flowers with (1) ………………………colours and various species. Flowers can be found (2) ……………………….and in any season. We ca see flowers in Da Lat in the parks, (3) ……………………. of the houses, in the gardens etc . Da Lat has the widest range of orchid varieties in the country. Da Lat has (4) …………………… rivers and canals but it has many picturesque waterfalls. It takes tourists several days (5) ………………………all the waterfalls in the area. The famous Cam Ly Falls is only 3 kilometers (6) ………………………the town center. The Prenn Falls is 10 kilometers in the south of Da Lat.  The water (7) ………………………down like a white shade. Da Lat people are very (8) …………………of it. They always boast to tourists about it in the first place. Around the Prenn Falls is the valley of various flowers and pine hills

1.A. different                  B. general                  C. official                              D. astounding

2.A. somewhere              B. anywhere              C. nowhere                            D. everywhere

3.A. behind                     B. next to                   C. opposite                            D. in front

4.A. few                           B. little                       C. much                                 D. lots of

5.A. visit                          B. visiting                  C. to visit                               D. visited

6.A. in                              B. at                            C. to                                        D. from

7.A. falls                          B. goes                       C. pours                                 D. walks

8.A. pride                        B. priding                  C. prided                                D. proud

Gọi số thảm xí nghiệp đó làm được trong 18 này là x (x ϵ N*)

=>Số thảm xí nghiệp đó được giao làm là x-24

=>Năng suất làm việc theo dự định là \(\dfrac{x-24}{20}\)

=>Năng suất làm công việc trên thực tế là \(\dfrac{x}{18}\)

Theo đề bài ta có phương trình

\(\dfrac{x-24}{20}\)+\(\dfrac{x-24}{20}\).20%=\(\dfrac{x}{18}\)

<=>45x-1080+9x-216+180=50x

<=>4x=1116

<=>x=279 (thỏa mãn điều kiện)

Vậy số thảm đội công nhân đó làm được trong 18 ngày là 279

Số tự nhiên đó là :

   2244 : (2+0) = 1122

Tích đúng là :

   1122 x 20 = 22440

                  Đáp số 22440

Số tự nhiên đó là 1122

Tích đúng là : 22440

Tick cho chị nha. Thanks

151x16=2416

151x16=2416