( )是法律赋予每个公民的权利和义务，是每个热爱社会主义祖国的公民义不容辞的政治责

She studies ___ medicine before she turned ___ writer.

A．×; ×

B．the, a

C．×; a

D．the; ×

概念模型是( )。

A．依赖于DBMS和硬件
B．独立于DBMS和硬件
C．依赖DBMS
D．独立于DBMS

校验高压断路器的热稳定性时，应采用三相短路电流的（）。

A.稳态值

B.非周期分量

C.冲击值

D.有效值

《治安管理处罚法》规定了治安管理处罚的调查程序。下列关于调查的说法，不正确的是( )

A．公安机关在受理报案后，认为属于违反治安管理行为的，应当在7日内展开调查

B．公安机关在受理控告后，认为不属于违反治安管理行为的，应当告知控告人，并说明理由

C．公安机关在受理投案后，认为属于违反治安管理行为的，应当立即进行调查

D．公安机关以殴打等非法手段收集的证据不得作为处罚的根据

Personal computers are used by one person at a time. The largest personal computer, or PC.S, can fit on a (1) . Some of these (2) have more than one microprocessor. (3) the primary processor, which is a general-purpose device, a PC may have one or more processors to (4) special kinds of work. Some machines, (5) , have maths processors, others have graphics processors to help process photographs and other illustrations. Still others have (6) processors.

Office workers also use PCS that are not (7) to a network. These machines are used for (8) tasks as word processing, performing financial calculations, and organizing and (9) bodies of information called databases. People use PCS at (10) for some of the same kinds of tasks. They use word processing programs for (11) communication, financial software for household budgets. Individuals also use their home computers to play (12) and to communicate (13) the internet.

Small, portable PCS are (14) with people who often work away from their desks. The (15) include laptop computers, which can be (16) on the lap; notebook computers, which are about the (17) of a loose leaf notebook; and palmtop, or handheld computers, which can be operated while (18) in the hand. Laptop and notebook computers have the same (19) as desktop computers. Palmtop computers have less power but still (20) some advanced capabilities. For example, they can process household financial data.

5（）

A. for example

B. by the way

C. in the other hand

D. What’s more