在融合空域运行的充气体积在4,600立方米以上的遥控飞艇驾驶员,应至少持有()
A.飞艇私照
B.飞艇商照
C.热气球商照
参考答案:B
用所给词的适当形式填空。
1. I have a________busy week. (real)
2. Thanks for your________to the party next week. (invite)
3. Today is Tom's________birthday. (fourteen)
4. My________brother is two years________than me. (old)
网络投诉须在投诉产生或收到转发后多长时间内回复()
A.36小时
B.24小时
C.12小时
D.立即