问题
单项选择题
程序流程图(PFD) 中的菱形代表的是
A) 数据流
B) 控制流
C) 加工步骤
D) 逻辑条件
答案
参考答案：D
解析： 程序流程图是软件设计过程中常用的图形描述工具之一。构成程序流程图的最基本符号有：“→”或“↓”，表示控制流；“口”，表示加工步骤；“◇”，表示逻辑条件。
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程序流程图(PFD) 中的菱形代表的是
A) 数据流
B) 控制流
C) 加工步骤
D) 逻辑条件
参考答案：D
解析： 程序流程图是软件设计过程中常用的图形描述工具之一。构成程序流程图的最基本符号有：“→”或“↓”，表示控制流；“口”，表示加工步骤；“◇”，表示逻辑条件。
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| Happiness is for everyone. And you don't need to care about those people who are very 1 . Why? Because those who have big houses may often feel 2 and those who have cars may want to 3 on the country roads in their free time. In fact, happiness is 4 around you if you put your heart into it. When you are 5 , you may feel worried. But remember that your friends will help you; when you study hard at your lessons, you may feel 6 ; but you know your parents are always taking good care of your life and your 7 ; when you get success, your friends will say 8 to you; when you do something wrong, people around you will help you to correct it. And when you do something 9 to others, you will feel happy, too. All these are your happiness. Happiness is not 10 as money; it is a feeling of your heart. When you are 11 , you can also say you are very happy, because you have something else that money can't buy. When you meet with 12 , you can say loudly you are very happy, because you have more chances to challenge yourself. As the saying goes: Life is like a revolving (转动的) door. When it closes, it also 13 . If you take every chance you get, you can be a happy and 14 person. So let's be 15 every day. |
| ( )1. A. poor ( )2. A. serious ( )3. A. walk ( )4. A. hardly ( )5. A. in public ( )6. A. happy ( )7. A. healthy ( )8. A. hello ( )9. A. good ( )10. A. same ( )11. A. poor ( )12. A. thieves ( )13. A. closes ( )14. A. luck ( )15. A. busy | B. rich B. unknown B. work B. never B. in trouble B. sad B. health B. congratulations B. bad B. the same B. rich B. animals B. shuts B. lucky B. happy | C. nice C. strange C. knock C. always C. at home C. tired C. beauty C. sorry C. right C. different C. angry C. problems C. turns C. luckily C. excited | D. bad D. lonely D. talk D. ever D. at break D. relaxed D. beautiful D. angry D. wrong D. difference D. healthy D. signs D. opens D. unlucky D. outgoing |