软件危机出现于60年代末，为了解决软件危机，人们提出了【 】的原理来设计软件这就

阅读短文，回答问题。

Kangkang: Hello, Tom. It's Kangkang. Would you like to play football now?

Tom: No, I'm sorry, Kangkang. I can't. I'm busy.

Kangkang: What are you doing?

Tom: I'm helping mom. We're painting (粉刷) our house. It's interesting.

Kangkang: Can I help? I love painting.

Tom: Yes, if (如果) you like. Come now. Wear some old clothes.

Kangkang: OK. See you in 15 minutes. See you later!

Tom: See you! 

1. Who is Kangkang phoning?

________________________________________________

2. Why can't Tom play football now?

________________________________________________

3. Does Kangkang like painting?

________________________________________________

4. Does Kangkang want to help Tom?

________________________________________________

5. What must Kangkang wear?

________________________________________________

以下致病微生物所导致的肺炎与其首选抗生素搭配正确的是

A．肺炎球菌——氨基苷类抗生素
B．军团菌——喹诺酮类抗生素
C．支原体——三代头孢菌素
D．克雷白杆菌一一氨基苷类抗生素
E．流感嗜血杆菌——红霉素

如果用超导体制成发电机和电动机中的线圈，可以装配成 _________ 小、 _________ 大、 _________ 高的发电机和电动机．

[问题2] 请简要说明完善性维护、适应性维护、纠错性维护、预防性维护的含义。

物流中心的商品储存的过程一般包括______、______、______和______等环节。