加工一批零件，甲乙合作24天可以完成，现在由甲先做16天，然后由乙方再做12天，还剩下这批零件的
|
甲、乙合作12天，完成了总工程的几分之几：
×12=1 24
；1 2
甲1天能完成全工程的几分之几：
（1-
-2 5
）÷（16-12），1 2
=
÷4，1 10
=
；1 40
乙1天可完成全工程的几分之几：
-1 24
=1 40
；1 60
这批零件共多少个：
3÷（
-1 40
），1 60
=3÷
，1 120
=360（个）；
答：这批零件共360个．
| 阅读理解。 | ||
| ||
| 1. Which country does Wang Ting want to go? | ||
| A. Japan. B. Britain. C. Australia. D. Canada. | ||
| 2. Wang Ting ________. | ||
| A. is going to learn Japanese during the study B. must write a report after the study C. should have some sports before the study D. will pay for the study all by herself | ||
| 3. From the letter, we know Li Cang ________. | ||
| A. is a traveler B. likes writing letters C. is the head of CCTV 10 D. is Wang Ting's teacher | ||
| 4. What are Wang Ting's favourite sports? | ||
| A. Basketball arid football. B. Football and horseriding. C. Climbing and skating. D. Basketball and badminton. |