题目内容
后缀式ab+ cd+/可用表达式(23)表示，表达式(a+ b)*c的后缀式表示为(24)。
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面向对象数据库是(42)的集合。
一个有两个作业管理进程的批处理系统，作业调度采用基于优先数(优先数大表示优先级别高)的算法，进程调度采用短作业优先的算法(按剩余运行时间计算作业的长短)。有以下作业序列：
作业F的运行结束时间为(23)(假定在作业运行期间，除了有空闲的作业管理进程以外，系统不进行调度工作)
计算机控制器的设计有两种方案：组合逻辑方案和微程序方案，微程序方案对指令的扩充、修改，调试、维护都方便，因而得到广泛应用。计算机中微程序放在(6)中。
Pack tightly. Packing loosely wastes precious space and causes clothes to wrinkle.
Use a divider shelf to separate accessories, irregularly shaped items, and shoes from your garmeats.
You may also want to stuff your shoes with underwear or socks so they won't be crushed during your travels.
Suits, dresses, shirts, and blouses should be packed in a plastic dry cleaner bags to limit wrinkling.
Roll pajamas, nightgowns, sweaters, and other casual wear to fill small spaces when possible, BUT don't cram your suitcase full. If you have to force your luggage to close, remove a few items to prevent broken hinges or zippers along the way.
Try the "interweaving method" of packing for your next trip. Drape longer garments such as dresses and pants around the suitcase with the ends hanging over the sides. Then fold shorter items such as jackets, shirts and blouses around the longer garments so that the clothes cushion each other. Placing a piece of tissue paper between each layer of clothing will help prevent wrinkling.
Pack each item one at a time in a clockwise direction. When you have filled the bottom of the suitcase, begin the next layer packing each item in a counter clockwise direction. In this way, you will form. one complete package of your clothes, eliminating wrinkles and securing all of your contents.
Always carry your travel documents, medication, jewelry, traveler’s checks, keys and other valuables in your hand luggage. These items should NEVER be packed in luggage you plan to check.
To avoid travel delays when you depart check with the Transportation Security Administration to verify that the items you are carrying on the plane are allowed onto the aircraft. You'll find a complete list of prohibited items on TSA website.
Which of the following statements is not true according to your reading？
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