严某，1975年12月入伍，1984年转业到省政府机关工作，1992年8月辞职去某民营企业工作，参加基本养老保险，其缴费年限应从（）算起。

A:1975年12月 B:1984年 C:1992年8月 D:1995年

1975年地球上人口（）

A:10亿 B:20亿 C:40亿 D:60亿

A:1960-1965年 B:1965-1970年 C:1975-1980年 D:1970-1975年

A:1960～1965年 B:1965～1970年 C:1975～1980年 D:1970～1975年

Text 1
Populations tend to grow at an exponential rate. This means that they progressivel, double. As an example of this type of growth rate, take one penny and double it every day for one month. After the first week, you would have only 64 cents, but after the fourth week you would have over a million dollars.
This helps explain why the population has come on "all of a sudden". It took from the beginning of human life to the year 1830 for the population of the earth to reach one billion. That represents a time span of at least two million years. Then it took from 1830 to 1930 for world population to reach 2 billion. The next billion was added by 1960, only thirty years, and in 1975 world population reached 4 billion, which is another billion people in only Fifteen years.
World population is increasing at a rate of 9,000 per hour, 220,000 per day, 80 million per year. This is not only due to higher birth rates, but to lower death rates as well. The number of births has not declined at the same rate as the number of deaths.
Some countries, such as Columbia, Thailand, Morocco, Costa Rica, and the Philippines, are doubling their populations about every twenty - one years, with a growth rate of 3.3 percent a year or more. The United States is doubling its population about every eighty-seven years, with a rate of 0.8 percent per year. Every time a population doubles, the country involved needs twice as much of everything, including hospitals, schools, resources, food and medicines to care for its people. It is easy to see that this is very difficult to achieve for the more rapidly growing countries.

A:100 years B:145 years C:1975 years D:Over two million years

在某数据库中已知有一个名为“职工”的表，则查询1975年7月27日出生的职工信息的正确命令是（）。
职工.DBF://职工号C（10），姓名C（10），性别C（2），出生日期D

A:SELECT*FROM职工WHERE出生年月=1975-07-27 B:SELECT*FROM职工WHERE出生年月=1975-07-27 C:SELECT*FROM职工WHERE职工.出生年月="^1975-07-27" D:SELECT*FROM职工WHERE职工.出生年月=1975-07-27

已知在某数据库中有一个名为“职工”的表，则查询1975年之前出生的职工信息（姓名、性别和出生日期）的正确命令是（）。职工.DBF://职工号C（10），姓名C（10），性别C（2），出生日期D

A:SELECT 姓名，性别，出生日期 FROM 职工 WHERE 出生日期＜1975  B:SELECT 姓名，性别，出生日期 FROM 职工 WHERE 出生日期＞1975  C:SELECT 姓名，性别，出生日期 FROM 职工 WHEREYEAR（出生日期）＜1975  D:SELECT 姓名，性别，出生日期 FROM 职工 WHEREYEAR（出生年月），1975

在某数据库中已知有一个名为“职工”的表，则查询1975年7月27日出生的职工信息的正确命令是（）。
职工.DBF:职工号C(10)，姓名C(10)，性别C(2)，出生日期D

A:SELECT*FROM职工WHERE出生年月=1975-07-27 B:SELECT*FROM职工WHERE出生年月=1975-07-27 C:SELECT*FROM职工WHERE职工.出生年月="^1975-07-27" D:SELECT*FROM职工WHERE职工.出生年月=1975-07-27