Do you need ___ coffee? A．some B．any C．m

在“探究同种物质的质量和体积关系”的实验中，小明对A、B两种物质进行了探究，对实验数据进行处理，得到了如图所示的图像。

（1）从所得到的图像来看，同种物质的质量和体积具有                关系；

（2）A、B两种物质中，_____________物质的密度较大。

阅读理解。

     Most dog owners feel that their dogs are their best friends. Almost everyone likes dogs because they try

hard to please their owners. One of my favorite stories is about a dog who wanted his owner to please him.

     One of my friends has a large German shepherd (牧羊狗) named Jack. Every Sunday afternoon, my friend

takes Jack for a walk in the park. Jack likes these long walks very much.

     One Sunday afternoon, a young man came to visit my friend. He stayed a long time, and he talked and

talked. Soon it was time for my friend to take Jack for his walk, but the visitor didn't leave. Jack became very

worried about his walk in the park. He walked around the room several times and then sat down directly in

front of the visitor and looked at him. But the visitor paid no attention. He continued talking. Finally, Jack could

n't stand it any longer. He went out of the room and came back a few minutes later. He sat down again in front

of the visitor, but this time he held the man's hat in his mouth.

     German shepherds aren't the only intelligent dogs. Another intelligent dog is a Seeing Eye dog. This is a

special dog which helps blind people walk along the streets and do many other things. We call these dogs

Seeing Eye dogs because they are the "eye" of the blind people and they help them to "see". Seeing Eye dogs

generally go to special schools for several years to learn to help blind people.

1. The writer tells the story about the dog Jack to show that _____.

A. it, like many other dogs, always tried to please its master

B. it, unlike many other dogs, always wanted its master to please it

C. it was more intelligent than many other dogs

D. it was the most faithful dog of his friend's

2. Jack came to sit in front of the visitor in order to _____.

A. please him

B. be pleased

C. ask him to leave immediately

D. invite him for a walk

3. The sentence "Finally, Jack couldn't stand it any longer." means _____.

A. Jack could no longer put up with the visitor

B. Jack could no longer stand but he might sit down

C. Jack was very tired and wanted a rest

D. Jack was very angry with the visitor

4. Which of the following titles would be the best for the passage?

A. Dogs-A Great Help to People

B. Dogs-Our Faithful Companions

C. An Introduction to Dogs

D. Famous Dogs in Germany

容易使井底压漏的操作是（）。

A、起钻过快

B、下钻过快

C、钻进

D、缓慢开泵

江某（女）在医院门口出售伪造的医院出生证明时，被正在巡逻的公安民警抓获。民警将江某带回公安派出所进行询问，江某对出售伪造的医院出生证明的行为供认不讳，称此举是为给自己仅5个月大的儿子买奶粉。此外，江某还向公安机关提供了其邻居杨某生产伪劣产品的情况。经公安机关调查，江某出售伪造的医院出生证明3份，所述事实均属实，并根据江某提供的线索成功侦破了杨某生产伪劣产品案。下列说法正确的有（）。

A.江某构成买卖伪造的证明文件的违反治安管理行为

B.江某为公安机关破获杨某生产伪劣产品一案提供重要线索，属于立功行为，依法应减轻或者不予处罚

C.江某有5个月大的婴儿需要哺乳，依法给予行政拘留处罚的，不执行行政拘留处罚

D.江某伪造的医院出生证明应当予以追缴

简要叙述有叶扩压器和无叶扩压器的优缺点。