影响X线穿透力的摄影技术条件是()(990-33)
A、千伏
B、毫安
C、焦片距
D、物片距
E、曝光时间
参考答案:A
[听力原文]11-15
Good evening. Welcome to the first meeting of our spring cycling season. It’s a pleasure to see so many new faces here. I certainly hope that most of you will soon feel right at home with our group.
The state of New Jercy offers enough opportunities for bicyclists of all abilities. Beginners will find the shore and area suitable for their needs while expert riders will meet a challenge to their skill and energy.
We organize tours to a variety of places nearly every weekend. Next Saturday’ s tour will be an easy one. Interested cyclists should meet at eight a.m. in the parking area. The minimum time for this tour is about six hours. You can pick up a map of Saturday’s tour at the information table before you leave this evening.
Where should the cyclists interested in next Saturday’s tour meet They should meet in()at 8 a. m.
《平行四边形的认识》一课中,教育技术在合作与交流的体现在()。
A.学习交流
B.家长交流
C.教师之间的交流
D.技术人员的交流