当炉水碱度不足，硬度太高时一般加（） A．磷酸钠 B．磷酸二钠 C．硝酸钠 D．亚硫

阅读理解。

     Few people ever took notice of Mr Jimmy Tan whenever he entered a room. He was a shy, quiet and

simple man who preferred to keep to himself in public. On the other hand, Mr Thomas Kim, a fellow

scientist, was a man everyone would notice on the streets. He wore bright outfits with huge flower prints,

spoke with a booming voice, and his laughter could be heard from all corners of a room. In addition to the

differences in their characters, Mr Kim and Mr Tan were also great rivals at work in the Institute of Future

Science.

     On Christmas Eve, everyone left work early to celebrate the special occasion, except for Mr Tan and

Mr Kim. They were in their laboratory analysing the results of their latest experiments. Mr Tan realized that

something special was taking place in his experiment -the bacteria he had cultured were growing extremely

quickly under high pressure and at a very low temperature. After noting down the findings in his notebook,

he left the room to prepare for another round of tests. Shortly after, Mr Kim entered.

     "Hey Jimmy," Mr Kim called out,"do you have an extra copy of the laboratory booking form?"

      There was no reply, so Mr Kim looked through Mr Tan's things. He soon found Mr Tan's notebook and

was horrified to see that Mr Tan had managed to make one of the most important discoveries in modern

science. He then looked into the deep-freeze cupboard where a dish containing the bacteria was kept. He put

them into his pocket and returned to his own laboratory.

     Mr Tan came back an hour later to find his notebook and the dish missing. He knew that Mr Kim had

taken them and went to Mr Kirn's laboratory to find out. When he opened the door, he found Mr Kim lying

on the floor motionless. His face was pale and his skin had turned black. The deadly bacteria had been handled

improperly. He shook his head and left.

1. From the first paragraph we know Mr Kim was a quite _____ person.

A. famous

B. hardworking

C. wealthy

D. outgoing

2. The underlined word "rivals" in the first paragraph is closest in meaning to _____. 

A. enemies

B. colleagues

C. competitors

D. friends

3. What does the underlined word "them" refer to in the 4th paragraph?

A. the most important discoveries

B. the notebook and the dish

C. the cupboard and the bacteria

D. the dish and the bacteria

4. Which of the following is true according to the passage?

A. Mr.Kim was afraid Mr.Tan might succeed ahead of him.

B. Mr.Tan's bacteria grew very fast in a warm container.

C. Mr Tan worked much harder than Mr.Kim.

D. Mr Kim was so tired that he fell down into sleep.

5. What happened to Mr.Kim in the end?

A. He died on Christmas Eve.

B. He was arrested by the police.

C. He shared the success with Mr.Tan.

D. He succeeded ahead of Mr.Tan.

在如图所示的四种情境中，人对物体做功的是 [ ]

A.

B.

C.

D.

风湿病二尖瓣狭窄病人经常出现呼吸困难、咳嗽和咯血等症状，随病程延长，上述症状减轻，但出现腹胀、肝大，提示（）。

A.二尖瓣狭窄程度减轻

B.发生二尖瓣关闭不全

C.合并主动脉瓣狭窄

D.合并主动脉瓣关闭不全

E.进入右心功能不全期

满清时期军机处于以下哪一时期设立（）

A、康熙时期

B、雍正时期

C、乾隆时期

D、嘉庆时期

甲公司拟购买一台大型生产设备，于2011年6月1日与乙公司签订一份价值为80万元的生产设备买卖合同。合同约定：
(1)设备直接由乙公司的特约生产服务商丙机械厂于9月1日交付给甲公司；
(2)甲公司于6月10日向乙公司交付定金16万元；
(3)甲公司于设备交付之日起10日内付清货款；
(4)合同履行过程中，如发生合同纠纷，向某市仲裁委员会申请仲裁。
合同签订后，丙机械厂同意履行该合同为其约定的交货义务。6月10日，甲公司向乙公司交付定金16万元。9月1日，丙机械厂未向甲公司交付设备。甲公司催告丙机械厂，限其在9月20日之前交付设备，并将履约情况告知乙公司。至9月20日，丙机械厂仍未能交付设备。因生产任务紧急，甲公司于9月30日另行购买了功能相同的替代设备，并于当天通知乙公司解除合同，要求乙公司双倍返还定金32万元，同时赔偿其他损失。乙公司以丙机械厂未能按期交付设备，致使合同不能履行，应由丙机械厂承担违约责任为由，拒绝了甲公司的要求。10月10日，甲公司就此纠纷向法院提起诉讼。法院受理后，乙公司提交答辩状并参加了开庭审理。
要求：根据上述情况和合同法、担保法、仲裁法等法律制度的有关规定，回答下列问题：

甲公司与乙公司约定的定金条款是否符合法律规定说明理由。