渠道设计的任务，是在给定的设计流量之后，选择渠道的（）、确定渠道形状、结构以及渠道（）。
参考答案：断面尺寸；空间位置
根据句意及首字母填空。
1. He likes collecting stamps, and I like collecting stamps, too. So we have a c_____ hobby.
2. The f_____ between us is very deep.
3. The old man likes telling stories. His funny stories make us l_____ a lot.
4. The two twin brothers are d_____ in some ways.
5. His little brother is only 7 years old. He is just a p_____ school student.
高频探头(7.5MH2)，其
A．穿透力好
B．横向分辨力高
C．侧向分辨力高
D．纵向分辨力低
E．纵向分辨力高，但穿透力差
