机电工程开工前，项目部应根据项目质量计划、施工组织设计、施工方案对检测设备的精度要求

下列哪项因素调节硬膜外麻醉平面最重要（）

A.注药方式

B.注药速度

C.药物种类

D.药物浓度

E.病人体位

急性CO中毒急救错误的是()

A．吸氧

B．保持呼吸道通畅

C．用解磷定解毒

D．脱离中毒现场

E．立即开窗通风

补骨脂的扁圆形壁内腺存在的位置是

A．种皮表皮细胞下

B．种皮薄壁组织中

C．子叶细胞间隙中

D．中果皮薄壁组织中

E．果皮凹陷处，表皮下

阅读理解.

     Many animals recognize their food because they see it. So do humans. When you see

an apple or a piece of chocolate you know that these are things you can eat. You can also

use other senses when you choose your food. You may like it because it smells good or

because it tastes good. You may dislike some types of food because they do not look,

smell or taste very nice. Different animals use different senses to find and choose their food.

A few animals depend on only one of their senses, while most animals use more than one

sense.

     Although there are many different types of food, some animals spend their lives eating

only one type. The giant panda eats only one particular type of bamboo(竹子). Other animals

eat only one type of food even when given the choice. A kind of white butterfly will stay on

the leaves of a cabbage, even though there are plenty of other vegetables in the garden.

However, most animals have a more varied diet(多样化饮食). The bear eats fruits and

fish. The fox eats small animals, birds and fruits. The diet of these animals will be different

depending on the season.

     Humans have a very varied diet. We often eat food because we like it and not because

it is good for us. In countries such as France and Britain, people eat foods with too much

sugar. This makes them overweight, which is bad for their health. Eating too much red meat

and animal products, such as butter, can also be bad for the health. Choosing the right food,

therefore, has become an area of study in modern life.

1. We can infer from the text that humans and animals _________.

A. depend on one sense in choosing food

B.are not satisfied with their food

C. choose food in similar ways

D. eat entirely different food

2. Which of the following eats only one type of food?______.

A. The white butterfly.

B. The small bird.

C. The bear.

D. The fox.

3. Certain animals change their choice of food when ___________.

A. the season changes

B. the food color changes

C. they move to different places

D. they are attracted by different smells

4. We can learn from the last paragraph that __________.

A. food is chosen for a good reason

B. French and British food is good

C. some people have few choices of food

D. some people care little about healthy diet

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