现有铁和另一种金属组成的混合物，在5.6g该混合物中加入100 g一定溶质质量分

急性化脓性中耳炎的治疗原则包括（）

A.控制感染

B.通畅引流

C.病因治疗

D.清除病灶

E.以手术治疗为主

用括号内所给动词的适当形式填空。

1. Jack, one of my buddies, kept ________ (nod) his head as if he completely understood what I said.

2. Years ago we didn't know this, but recent science _________ (show)that people who don't sleep well will soon get ill.

3. He with his friends ________ (lie) in the sun and feeling relaxed on the Long Beach when his new boss called him.

4. We first met on a train in 2000. We both felt immediately that we ______ (know)each other for years.

5. Listen to the speaker carefully, or you __________ (miss) something important .

6. - The food here is nice enough.  

    - Yes,my friend ____________ (introduce) me a right place.

7. Jack told me that they ________ (return)to the USA from Shanghai by the end of next November.

8. To prevent the things getting worse, action should ___________ (take) at once.

地下室、半地下室出入口建筑面积的计算规则是( )。

A．按其上口外墙中心线所围面积计算

B．不计算

C．按其外墙上口外边线所围的水平面积计算

D．根据具体情况计算

下列哪项不属于设备“三好四会”内容中的“四会”（）。

A、会原理

B、会使用

C、会检查

D、会排除故障

操作系统中，可以并行工作的基本单位是 (1) ，它是系统核心调度及资源分配的基本单位，它是由 (2) 组成的。它与程序的重要区别之一是 (3) 。因资源竞争而引起死锁时，可以采取两种策略： (4) 和 (5) 。其中前者付出的代价较高。

1（）

A．作业

B．函数

C．进程

D．过程