The average age of the population in the Republic of Ireland in the latest census is 35.6.（）

The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.

A.mean high water

B.mean low water

C.half-tide level

D.mean sea level

Customs of Bulgaria: Marriage and Family保加利亚习俗：婚姻与家庭

The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride's dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.

The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short

supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.

Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women's responsibility.

(1)

The average age of students in a college is 20.8 years with standard deviation 0.9. It is also known that the distribution of age is NOT bell-shaped. According to Chebyshev’s theorem, what is the smallest interval that contains the age of at least 68% of students in this college().

A.Between 20.2 and 21.4

B.Between 19.9 and 21.7

C.Between 19.2 and 22.4

D.Between 18.0 and 23.6

is ______.

A.the average distance steamed per day over the duration of the voyage

B.charges against all parties in a marine venture to pay for damages

C.loss sustained by only one party

D.claimed after all liens against the vessel are settled

What was the average age of the runners at the beginning of the survey?

A．50

B．58

C．68

听力原文： In the United States, the average age of a college student used to be between eighteen and twenty-six years old. Not any more. Over the years, this has changed. Now many colleges and universities boast a large number of non-traditional students.

Many of these non-traditional students are older than the traditional students. Senior citizens are joining the ranks of non-traditional students on campuses throughout the United States. These non- traditional students frequently work during the day and go to school at night or on weekends. They may have started college after they graduated from high school, but later, because of family, or work responsibilities, had their education interrupted.

Traditional Students benefit from having older students in their classes. Senior citizens are excellent role models for some younger students who may not take college as seriously as they should. Senior attend college or the university, not because they have to, but because they want to. Some senior citizens take individual college courses only for personal enrichment. Others attend college to fulfill their lifelong dream of earning college degrees.

(33)

A．Under the ages of eighteen.

B．Between the ages of eighteen and twenty-six.

C．Between the ages of twenty-six and fifty-six.

D．Over sixty-five years of age.

The average income of the people in this small town is __________ in the past three years.

[A] more than doubled

[B] more doubled than

[C] much than doubled

[D] much doubled than

The average age of chief executive officers(CEOs)in a large sample of companies is The average age of CEOs in those same companies 20 years ago was approximately eight years younger. On the basis of those data, it can be concluded that CEOs in general tend to be older now. Which of the following casts the most doubt on the conclusion drawn above?

A．The dates when the CEOs assumed their current positions have not been specified.

B．No information is given concerning the average number of years that CEOs remain in office.

C．The information is based only on companies that have been operating for at least 20 years.

D．Only approximate information is given concerning the average age of the CEOs 20 years ago.

E．Information concerning the exact number of companies in the sample has not been given.

How did the author perform. in the regular English class?

A．He was about the average level.

B．He remained to be a top student.

C．He began to have slight difficulty.

D．He could no longer cope with the task,