如果一个多项式的次数是5，那么这个多项式的任何一项的次数满足（　　）

    It is Saturday morning. The sky is blue. My father and I are going to the park. There are a lot of people in the park. Some children are running on the grass. A dog is running after them. Some men are sitting on the grass. They are talking. Two girls are flying a nice kite. Three women are standing under a tree, and they are watching the children playing. There is a boat in the lake and two women are boating. Everyone in the park is very happy.

A: Here are all the clubs.

B: ____ club do you want to ____?

A: I want to join tile English club. How ____ you'?

B: Hmm. I want to join the ____ club. Can you ____ chess?

A: No, I ____ like chess. Do you like music?

B: Oh, yes. I ____ singing and dancing. I like music.

A: Me, too. Let's join the ____ club.

B: I can also learn to ____ the guitar in the music club.

A: That's great! I think I can ____ you with it.

B: Thanks a lot.

x=____

    不觉酒涌上来，潸然泪下，临风触目，感恨伤怀。忽然做了一首《西江月》的词调，便唤酒保，索借笔砚。起身观玩，见白粉壁上，多有先人题咏，寻思道：“何不就书于此？倘若他日身荣，再来经过，重睹一番，以记岁月，想今日之苦。”乘其酒性，磨得浓墨，蘸得笔饱，去那白粉壁上，挥毫便写道：“自幼曾攻经史，长成亦有权谋。恰如猛虎卧山丘，潜伏爪牙忍受。不幸刺文双颊，那堪配在江州！他年若得报冤仇，血染浔阳江口。”

    写罢，自看了，大喜大笑。一面又饮了数杯酒，不觉欢喜，自狂荡起来，手舞足蹈，又拿起笔来，去那《西江月》后，再写下四句诗，道是：“心在山东身在吴，飘蓬江海谩嗟吁。他时若遂凌云志，敢笑黄巢不丈夫。”

（选自《水浒传》第三十九回）