对塔板压力降其中的液层压力降即（）A、干板压力降B、克服表面张力的压降C、通过液层的

Read and answer the questions. (根据短文内容回答下列问题。)

    A businessman had worked too much. He found that he couldn't sleep at night, but often fell asleep

in the day. He became very worried, so he went to see his doctor. 

    "Can you help me, doctor?" he asked. I slept so well, but now I slept less than two hours at night. 

    The doctor looked him very carefully, gave him some tests, asked him to work less hard, and told

him to take some medicine to help him. He said he was sure that he was not seriously ill, and that he

would soon be better. 

    But the businessman grew worse instead of better. He slept even less than before at night and was

still falling asleep in his office. He visited the doctor again and again and it took the doctor a long time

to find out the reason: the businessman's wife was giving him the sleeping medicine in the morning and

the ones to keep him awake at night.

1．Why couldn't the businessman sleep at night?

      _________________________________________________

2．How long does he sleep now at night? 

      _________________________________________________

3．Did the doctor think the businessman had a serious problem?

      _________________________________________________

4．Did the businessman grow worse or better after seeing the doctor?

      _________________________________________________

5．Was the doctor able to find the real reason for the business's problem?

      _________________________________________________

6．Who was responsible for the businessman's problem?

       _________________________________________________

Disco厅中的摩盘机实际上是可以随意改变唱速的电唱机。( )

整句的使用是《记梁任公先生的一次演讲》的一大特点。将下面文字中画线的句子改为用整句的形式表达。（6分）

倾听，简单地说是人与人交流的方式方法，而从本质上说则是做人的学问和境界。会不会倾听，不仅仅是个性、习惯问题，它涉及对人的理解、尊重。不懂倾听的人往往是自私的人，心胸狭窄的人不会倾听，那些不知倾听的人又缺乏爱心。

在学习重力势能知识时，小明同学猜想物体的重力势能的大小可能与下列因素有关：①物体所在的高度；②物体质量的大小。为了证明自己的猜想，他首先对因素①进行验证。他把橡皮泥平铺在水平面上，让1个小球从不同高度自由下落，记录结果如下表所示。

（1）小明同学可以依据                来判断重力势能的大小；

（2）本实验的结论是              　　　　 ；

（3）若想对因素②进行验证，你认为实验中应控制                相等。

企业所有的产品都统一使用一个品牌名称，这种品牌统分策略是（）。

A.个别品牌

B.统一品牌

C.分类品牌

D.特殊品牌