已知下表为250C时某些弱酸的电离平衡常数。下图表示常温时，稀释CH3COOH、

There aren't any ___ on the farm.[ ]

A. a sheep

B. sheeps

C. sheep

阅读下面的短文，然后以约30个词概括短文的内容。

     Mother’s Day was coming, a man stopped at a flower shop to order some flowers to be wired to his mother who lived two hundred miles away.

     As he got out of his car, he noticed that a young girl was sitting on the curb sobbing (啜泣). He asked her what was wrong with her and she replied, “I wanted to buy a red rose for my mother. But I only have seventy-five cents, and a rose costs two dollars.”

     The man smiled and said, “Come on in with me. I’ll buy you a rose.”

     After they went in, he bought a rose for the little girl and ordered flowers for his own mother.

As they were leaving, he offered to ride the girl home. She said, “Yes, please! But can you take me to my mother?” “To your mother?” the man was a little puzzled but didn’t say anything. She directed him to a cemetery, where she placed the rose on a freshly dug grave (坟墓).

     The man was shocked and returned to the flower shop, canceled the wire order, picked up a bunch of flowers and drove the two hundred miles to his mother’s house.

男性，65岁，右腹股沟可复性球形肿块2年。逐渐增大。查体：站立时右耻骨结节外上方可见一球形肿物。未进入阴囊，平卧时可自行回纳，压迫腹股沟韧带中点上方2cm处站立时肿物复出，应诊断为( )

A．右腹股沟斜疝
B．右侧腹股沟直疝
C．右侧股疝
D．右侧精索鞘膜积液
E．交通性鞘膜积液

通信终端协议

下列属于建筑节能子分部工程的有（）

A.围护系统节能

B.电气动力节能

C.监测系统节能

D.供暖节能

E.可再生能源