汽包工作的好坏主要反应在液面上，液面过高，容易使饱和蒸汽带水，蒸汽含盐量（），会沉积

下列对合同类型的选择正确的是( )。

A．项目规模小、工期短，竞争情况激烈，项目复杂程度低，类别和工程量都很清楚的项目应选择单价合同
B．成本加酬金合同适用于规模大，工期长，竞争不激烈，项目复杂程度高，单项工程分类与工程量都不甚清楚，项目外部环境因素恶劣的项目
C．规模和工期适中，项目竞争情况正常，项目复杂程度中等，单项工程类别清楚，工程量有出人，项目的外部环境因素一般的项目适于总价合同
D．合同类型的选择在投标时进行

People express their personalities in their clothes, their cars, and their homes. Our diets can also show our personalities because we might choose certain food to tell people something about us.

For example, some people mainly enjoy high quality food, such as caviar (鱼子酱) and lobster (龙虾), and they eat only in expensive restaurants – never in cafeterias or bars. They know about the “better things in life”.

Some people choose not to eat meat. Vegetarians often have more in common than just their diet. Their personalities might be similar too. For instance, vegetarians in the United States and Canada may be creative people, and they might not enjoy competitive sports or jobs. They worry about the health of the world, and they are probably strongly against the war.

Some people eat mostly fast food. One study shows that many fast-food eaters have a lot in common, but they are very different from vegetarians. They are competitive and good at business. They are also usually in a hurry. Many fast-food eaters might not agree with this description of their personalities, but it is a common picture of them.

Some people also believe that people of the same astrological sign（星座）have similar food personalities. Aries (born under the sign of Aries, between March 21 and April 20) usually like spicy foods, with a lot of onions and pepper. People with the sign of Taurus (April 21 to May 22) prefer healthful fruits and vegetables, but they often eat too much. Sagittarius (November 22 to December.22) like traditional food from many different countries.

What is your food personality?

小题1:Why do some people mainly eat high quality food?

A．They want to show off their wealth.

B．Food can show off their social position.

C．They want to enjoy better things in life.

D．They are wiser than any other persons.小题2:A vegetarian may be a person________.

A．who is believed to be a peace – lover

B．who values the importance of success

C．who cares little about the future of the world

D．who shows his power to make money小题3:From the passage, we can draw a conclusion that_____________.

A．food is just a mirror of the human history

B．we can know a person from what he eats

C．people are particular about the food they eat

D．what people eat may change their personalities

麻花钻的工作部分采用高速工具钢，柄部采用碳素钢

应激生理反应的神经机制主要通过以下途径调节（）

A.交感神经-肾上腺髓质轴

B.下丘脑-腺垂体-肾上腺皮质轴

C.下丘脑-神经垂体轴

D.下丘脑-腺垂体-甲状腺轴

合同类型的选择取决于风险的程度或者项目经理面临的不确定性。从买方的角度来看，适宜的低风险合同类型是（）。

A、固定价格合同

B、固定酬金合同

C、成本加固定酬金合同

D、成本加成本比例合同