依据《中华人民共和国海洋环境保护法》，下列说法中，符合海岸工程建设项目对海洋环境的污染损害防治规定有（）。

A、严袼限制在海岸采挖沙石

B、环境保护设施未经海岸行政主管部门验收不得投入生产

C、兴建海岸工程建设项目，必须采取有效措施，保护海洋水产资源

D、环境保护设施未经海洋行政主管部门检查批准，建设项目不得试运行

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