用所给单词的适当形式填空。

dangerous, exciting, busy, difficult, boring  

1. Jim is a waiter in a big hotel. He is very          at night.  

2. I don't like the documentaries because they are           .  

3. Many young people want to be actors. They think it is an             job.  

4. Math is too             for me to learn well.  

5. Sometimes it's          to be a news reporter.

关于输尿管的说法，不正确的是()

A．止于膀胱外上角

B．跨闭孔动脉、神经的内侧

C．沿盆侧壁向后下走行

D．女性子宫动脉跨越其前上方

E．男性输精管由外向内侧跨越其前上方