Everyone knows that fish is good for health. 16 But it seems that many people don’t cook fish at home. Americans eat only about fifteen pounds of fish per person per year, but we eat twice as much fish in restaurants as at home. Buying, storing, and cooking fish isn’t difficult. 17 This text is about how to buy and cook fish in an easy way.
18 Fresh fish should smell sweet: you should feel that you’re standing at the ocean’s edge. Any fishy or p smell means the fish isn’t fresh. 19 When you have bought a fish and arrive home, you’d better store the fish in the refrigerator if you don’t cook it immediately, but fresh fish should be stored in your fridge for only a day or two. Frozen fish isn’t as tasty as the fresh one.
There are many common methods used to cook fish. 20 First, clean it and season it with
your choice of spices(调料). Put the whole fish on a plate and steam it in a steam pot for 8 to 10
minutes if it weighs about one pound. (A larger one will take more time.) Then, it’s ready to serve.
17（）
A. Do not buy it.
B. The easiest is to steam it.
C. This is how you can do it.
D. It just requires a little knowledge.
E. The fish will go bad within hours.
F. When buying fish, you should first smell it.
G. The fats in fish are thought to help prevent heart disease.
图12-3 
图12-4 在图12-5所示的“选择协议类型”下拉列表框中应选择 (3) 。 对于SNMP协议，在图12-6中设置“从此端口”项的值为 (4) ，“到此端口”项的值为 (5) ：对于SNMP TRAP协议，在图12-6中设置“从此端口”项的值为 (6) ，“到此端口”项的值为 (7) 。 
图12-5 
图12-6