以下程序的输出结果是（ ）。 #include＜iostream．h＞ void main( ) { int a=21，b=11； cout＜＜- -a+b；}
A． 建立自定义对话框时必须执行添加窗体的操作
B． 自定义对话框实际上是VB的窗体
C． 在窗体上还要使用其他控件才能组成自定义对话框
D． 自定义对话框不一定要有与之对应的事件过程
参考答案：D
解析：所有的字节输出流都继承于OutputStream类。
| 完形填空。 | |||
| Gareth looked at the beautiful stones in the bag. "I will not be __1__ until the bag is full (满的). I must find some more," said he. As Gareth went into the forest (森林), he saw someone__2__stones. It was Brog. He put many stones into a bag. Gareth liked those stones very much. " __3__can I get those stones from him?" Gareth thought. "I know. I'll make a trade (交易) with him." "Excuse me! I'd like to have a word with you," Gareth shouted. Brog __4__and turned around. "What do you want?" "My name is Gareth and this is my forest. I'm afraid all those stones that you've got in your bag are __5__." "Yours? Since when have you owned the forest?" "I have always owned it, but I will be happy to make a trade. Why don't you come __6__ me to my house? You can __7__ anything you like. All I ask for is that you let me keep __8__in your bag." Gareth felt quite proud that he'd come up with __8__ a great idea. Brog followed Gareth back to his house. Then he saw a(n) __9__ in the kitchen, and he knew what he wanted. "I want her," he said. "You want my wife?" Gareth was worried. Should he keep his word and live alone? | |||
| ( )1. A. happy ( )2. A. cutting up ( )3. A. When ( )4. A. stopped ( )5. A. hers ( )6. A. at ( )7. A. buy ( )8. A. something ( )9. A. very ( )10. A. UFO | B. worried B. picking up B. Why B. left B. yours B. into B. choose B. everything B. too B. stone | C. unhappy C. setting up C. How C. started C. mine C. out C. borrow C. nothing C. so C. alien | D. terrified D. cleaning up D. What D. refused D. ours D. with D destroy D. anything D. such D. woman |