北京师范大学将自主研发的（）技术成果以750万元的价格转让给北京华海德源科技有限公司。该技术为世界首创，填补了国内外空白。
参考答案：海冰淡化成套
完成英语句子
1. (有)two maps and some pictures on the wall.
2. Her father (没有) any sister.
3. (有) some water in the cap.
4. —What's his (爸爸的) job?
—He is a teacher.
5. I can see (十九) students in the classroom.
6. Tom's school is a beautiful school and it's (英语) school.
通常被称为“旅游出口”的是经营( )。
A．国际出境旅游 B．国际入境旅游 C．国内旅游 D．出入境旅游
