对流换热系数的单位是()。
参考答案:千卡/米2·时·℃ 或 焦耳/米2·时·℃ 或 瓦/米2·℃)
阅读理解。
Today is Sunday. It's sunny. After breakfast, my father is in the living room. He is reading the newspaper. My mother is in the kitchen. She is washing the bowls and the chopsticks. I'm doing my homework in my room. We are very quiet.
1. How's the weather today?
A. rainy
B. sunny
C. snowy
2. What is my father doing?
A. He is watching TV.
B. He is reading a book.
C. He is reading the newspaper.
3. What is my mother doing now?
A. She is washing the dirty dishes.
B. She is eating breakfast.
C. She is washing the bowls and the chopsticks.
计算机送外维修必须在同级信通部门、保密部门或本业务部门计算机安全员的指导下进行,处理涉密信息的计算机送外维修需征求()意见,由()进行检查,防止发生泄密事件。
A.信通部门
B.保密部门
D.信通部门