布尔数据一般用于________,在流控制中常用。
参考答案:逻辑判别
小组讨论是指在一位主持人的带领下,一小组人围绕某个主题进行座谈讨论。下面对确保小组讨论效果的描述不正确的是()
A.选择适当的主持人
B.做好充分准备工作
C.掌握小组讨论的技巧
D.安排好小组人员座位排列
E.现场提出讨论主题
句型转换。
1. My brother is never late for school. (改为同义句)
My brother never _____ _____ schoo1 _____.
2. He can write a letter in English. (改为否定句)
He _____ _____ a letter in English.
3. She has to go to bed by 9 o'clock. (用 usually改写)
She _____ _____ _____ bed at o'clock.
4. They got to Beijing yesterday. (改为同义句)
They _____ _____ Beijing yesterday.
5. Mr. Hu has to cook dinner today. (改为否定句)
Mr. Hu _____ _____ _____ cook dinner today.