题目

一个时长为10秒、400X300像素、16位色、PAL制式（25帧/秒）的未经压缩的AVI格式无声视频文件，压缩为MP4格式后的文件大小约为570KB，则其压缩比约为（ ） A . 100:1 B . 25:1 C . 410:1 D . 10:1 答案：A根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。To dry fish, you will need either a drying table or a place to hang them. If a table is used, it should have a top made of wire screen or thin pieces of wood with space between each piece.    小题1:Do not let them touch each other. Be sure that air can flow around the fish from all sides, including the top and bottom. Build a small smoky fire under the drying table for the first day to keep the flies away. After that, you can keep the flies away by covering the fish with a thin cloth.   小题2:    Fish taste better if they are out of bright sunlight while they are being dried.   小题3:    Turn the fish over every other day. Small fish will dry in about three days if the air is dry.   小题4: After the fish have dried, place them in a basket.   小题5: Then put the basket in a cool, dry place off the ground. Make sure as much of the saltwater as possible is removed before you smoke the fish. A．For best results, put the drying table under a tree.B．Cover them with clean paper or large leaves.C．Lay the cleaned and salted fish, still wet, on the table.D．Wood from fruit trees makes good fuel for your fire.E. Do not let the cloth touch the fish. F. Dried fish must be kept completely dry until they are eaten.G. Large fish will take a week or ten days to dry.