问题 填空题

蓄水池每分钟流入的水量都相同,如打开5个水龙头,2.5小时把水放尽,如打开8个水龙头,1.5小时把水放尽,现打开13个水龙头,______个小时把水放尽.

答案

①设1个水龙头1小时放走的水量为1,则蓄水池1小时流入的水量为:

(1×5×2.5-1×8×1.5)÷(2.5-1.5)=0.5;

②1×5×2.5-0.5×2.5=11.25;

③11.25÷(13-0.5)=0.9(小时).

故答案为:0.9.

填空题
完形填空

I got my first real job when I was ten.My dad,Benjamin,injured his back when working in a cardboard-box factory and was retrained as a hairstylist.He   1  space in a little strip mall and gave his shop the fancy   2  of Mr.Ben’s Coiffure.The owner of the shopping center gave Dad a on his rent for cleaning the parking lot three  4  a week,which meant getting up at 3 am.To  5   rubbish,Dad used a little machine that looked like a lawn mower.Mom and I  

garbage cans and picked up litter by hand.   7  took two to three hours to clean the lot.I’d  8

in the car on the way home.

I did this for two years,  9 the lessons I learned there have lasted a lifetime.I  10 discipline and a strong work ethic,and learned at an early age the importance of   11  life’s competing interests —in my case,school, homework and a job.This really 12 during my senior year of high school,   13    I worked 40 hours a week flipping (翻动) burgers at a fast-food joint while 14 a full load of college-prep courses.

The hard work   15  off.I attended the US Military Academy and went on to  16   graduate degrees in law and business from Harvard. Later,I   17  a big Los Angeles law firm and was elected to the California State Assembly.In these  18  and in everything else I’ve done,I have never forgotten those nights in the parking lot.The    19  taught me that there is dignity in all work and that if people are working to   20  for themselves and their families,that is something we should honor. 

1. A.bought           B.had          C.rented                         D.built

2. A.sign               B.mark         C.name                   D.board

3. A.discount         B.bill        C.praise                  D.punishment

4. A.days               B.hours         C.mornings             D.nights

5. A.make up           B.fill up    C.pick up                     D.take off

6. A.emptied                 B.collected C.carried                   D.filled

7. A.This               B.That      C.I                   D.It

8. A.cry                        B.laugh    C.complain               D.sleep

9. A.though                  B.but       C.so                   D.then

10. A.acquired              B.wanted        C.liked                   D.called

11. A.gaining                B.balancingC.avoiding            D.abandoning

12. A.worked                B.did      C.happened                     D.helped

13. A.then                    B.when     C.while                   D.as

14. A.having                 B.joining    C.taking                 D.doing

15. A.paid                    B.took      C.laid                     D.kicked

16. A.ask                  B.seek     C.accept                    D.receive

17. A.went                    B.joined     C.opened                D.charged

18. A.ways                   B.jobs      C.schools               D.firms

19. A.lessons                 B.memoryC.experience                  D.teachers

20. A.support                B.earn      C.give                           D.provide