（）业务是指将用户发送/接收的短消息同步备份到系统数据库中的业务功能，用户也可以通过

等腰梯形两条腰的长度一定相等．______．（判断对错）

阅读理解。

     Michael Joseph Jackson (born August 29, 1958) is an American recording artist, entertainer, and

businessman. In the early 1980s, he became an important figure in popular music. The popularity of

his music videos, such as "Beat It", "Billie Jean" and "Thriller", helped bring the relatively new channel

to fame. Videos such as "Black or White" and "Scream" made Jackson a famous person on MTV in the

1990s. With stage performances and music videos, Jackson popularized a number of physically

complicated dance techniques, such as the robot and the moonwalk. His distinctive musical sound and

sound style influenced hip hop, pop and contemporary R&B artists.

     Jackson has donated and raised millions of dollars for beneficial causes through his foundation,

charity singles and support of 39 charities. The singer has experienced health concerns since the early

1990s and conflicting reports regarding the state of his finances since the late 1990s. Jackson married

twice and fathered three children.

     One of the few artists to have been inducted (进入) into the Rock and Roll Hall of Fame twice, his

other achievements include multiple Guinness World Records－including one for "Most Successful

Entertainer of All Time"－13 Grammy Awards, 13 number one singles in his solo career－more than

any other male artist in the Hot 100 era－and the sale of over 750 million units worldwide. As one of

the world's most famous men, Jackson's highly publicized personal life, coupled with his successful

career, has made him a part of popular culture for almost four decades.

1. What is the main idea of the passage?

A. The popularity of Michael Joseph Jackson's music videos

B. The health concerns and the finances of Michael Joseph Jackson

C. Michael Joseph Jackson's successful career

D. The brief introduction of Michael Joseph Jackson

2. Which of the following statements is TRUE according to the passage?

A. since the late 1990s, he has become an important figure in popular music.

B. Jackson made a number of physically complicated dance techniques popular.

C. The singer experienced health concerns in the early 1980s.

D. Only in America the sale of his works is over 750 million units.

3. How many times has he been inducted into the Rock and Roll Hall of Fame?

A. Once.

B. Twice.

C. Three times.

D. Five times.

计算机软件分系统软件和应用软件两大类，其中处于系统软件核心地位的是( )。

A．数据库管理系统

B．操作系统

C．程序预言系统

D．网络通信软件

1532年，德意志帝国国会颁布的《加洛林纳法典》是一部(　　　)

A．习惯法典

B．民事和民事诉讼法典

C．王室法典

D．刑事和刑事诉讼法典