问题 单项选择题

扫描仪与计算机的接口一般有三种,其中______是并行传输接口,它必须配有一块接口卡,通过该接口卡可以连接包括扫描仪在内的7~15个高速设备,其传输速度快,性能高,一般在专业应用场合使用。

A.SCSI

B.USB

C.PCI

D.FireWire

答案

参考答案:A

解析: 扫描仪与计算机的接口一般有SCSI、USB和FireWire(IEEE-1394)接口三种。题目中描述的是SCSI的性质。

单项选择题

Congress makes the laws in the United States. It has two pans, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.

The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees.

According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

Which of the following is true().

A. A representative serves for two years.

B. To become a senator is easier than to become a representative.

C. A senator performs his duties for a shorter time than a representative.

D. All presidents were representatives and then senators before becoming president of the United States.

单项选择题