当一进程因在记录型信号量S上执行P（S）操作而被阻塞后，S的值为（）。A.＞0 B.

根据首字母或汉语提示，在下列各句中填入一个适当的单词，使句子完整。

1. There is a supermarket b_____ the two buildings.

2. He's terribly ill. We must take him to h_____.

3. Alice is s_____ at the surprising news.

4. Every one in our class likes Jay Chou. He is a _____ pop star.

5. — What's the weather like today?

   — Can't you see the heavy clouds? It's c_____ today.

6. It's _____ (危险) to walk across the street with so heavy traffic!

7. — When does Tom _____ (到达)?

    — At about 3:00pm.

8. Now we have more sports time. We can _____ (放松) 1 hour every day.

9. Dongying is a _____ (美丽) city of Shandong.

10. Lots of _____ (树叶) fell on the ground this morning.

物体做平抛运动时，它的速度的方向和水平方向间的夹角α的正切tgα 随时间t变化的图像是下图中的[ ]

A．

B．

C．

D．

现有的规章文本中，哪些情况需封锁线路？

翅脉

一般情况下，现代服务创新型城市第三产业发达，但是社会综合服务能力较差。