问题 解答题

育才中学组织七年级师生去春游,如果单租45座客车若干辆,则刚好坐满;如果单租60座的客车,则少租一辆,且余15个座位.

(1)求参加春游的师生总人数;

(2)已知一辆45座客车的租金每天250元,一辆60座客车的租金每天300元,问单租哪种客车省钱?

(3)如果同时租用这两种客车,那么两种客车分别租多少辆最省钱?(只写出租车方案即可)

答案

(1)设单租45座客车x辆,则参加春游的师生总人数为45x人.

根据题意得:45x=60(x-1)-15,

解得:x=5.

所以参加春游的师生总人数为45x=225人;

(2)单租45座客车的租金:250×5=1250(元),

单租60座客车的租金:300×4=1200(元),

∵1200<1250,

∴以单租60座客车省钱;

(3)设租45座客车x辆,60座客车y辆.

∴45x+60y=225.

∵x,y均为正整数,

解得:x=1,y=3.

租45座客车1辆,60座客车3辆最省钱.

阅读理解

Having a husband means an extra seven hours of housework each week for women, according to a new study. For men, getting married saves an hour of housework a week. “It’s a well-known pattern,” said lead researcher Frank Stafford at University of Michigan’s Institute for Social Research. “Men usually work more outside the home, while women take on more of the housework.”

He points out that differences among households (家庭) exist. But in general, marriage means more housework for women and less for men. “And the situation gets worse for women when they have children.” Stafford said.

Overall, times are changing in the American home. In 1976, women busied themselves with 26 weekly hours of sweeping-and-dusting work, compared with 17 hours in 2005. Men are taking on more housework, more than doubling their housework hours from six in 1976 to 13 in 2005.

Single women in their 20s and 30s did the least housework, about 12 weekly hours, while married women in their 60s and 70s did the most – about 21 hours a week.

Men showed a somewhat different pattern, with older men picking up the broom more often than younger men. Single men worked the hardest around the house, more than that of all other age groups of married men.

Having children increases housework even further. With more than three, for example, wives took on more of the extra work, clocking about 28 hours a week compared with husbands’10 hours.

小题1:According to the “well-known pattern” in Paragraph 1, a married man ________.

A.takes on heavier work

B.does more housework

C.is the main breadwinner

D.is the master of the house小题2:How many hours of housework did men do every week in the 1970s?

A.About 28

B.About 26

C.About 13

D.About 6小题3:What kind of man is doing most housework according to the text?

A.An unmarried man.

B.An older married man.

C.A younger married man.

D.A married man with children.小题4:What can we conclude from Stafford’s research?

A.Marriage gives men more freedom.

B.Marriage has effects on job choices.

C.Housework sharing changes over time.

D.Having children means doubled housework.

单项选择题