目视检测可以使用焊缝检验尺进行（）A、有效焊喉的测量B、理论焊喉的测量C、相关焊喉的

一块平行四边形菜地，底是18.4m，高是9.2m．在这块地里种茄子，每棵苗占地0.18m²．这块地可以种茄子多少棵？（得数保留整数）

当一名司机被怀疑饮用了过多的酒精时，检验该司机走直线的能力与检验该司机血液中的酒精水平相比，是检验该司机是否适于驾车的更可靠的指标。如果正确，能最好地支持上述观点的一项是( )。

A．观察者们对一个人是否成功地走了直线不能全部达成一致

B．用于检验血液酒精含量水平的测试是准确、低成本和易于实施的

C．一些人在血液酒精含量水平很高时，还可以走直线，但却不能完全驾车

D．由于基因的不同和对酒精的抵抗能力的差别，一些人血液酒精含量水平很高时仍能正常驾车

建设新的物流信息系统的第一阶段的工作是（）。

A．系统实施

B．系统维护

C．系统设计

D．系统分析

( D )

Your body works 24 hours a day. It’s always building and repairing, feeding and cleansing itself. Its goal is to be ready for your every movement, breath, and thought. The quality of your life depends on how well your body works. And how well your body works depends on how much energy it gets. Energy comes from the food you eat. Food contains nutrients that your body needs for growth and energy.

By eating a balanced diet, your body gets the six important nutrients it needs. Minerals（矿物质） are nutrients that build bones and teeth. Minerals also form red blood cells and other substances. Water aids digestion and waste removal. Carbohydrates（碳水化合物） give your body its main source of energy. Two carbohydrates are sugars from foods such as fruits and vegetables and starches found in rice, potatoes, and bread. Fats help build cell membranes（膜）. Proteins repair and grow body tissues（组织）. Finally, vitamins help your body use carbohydrates, fats, and proteins.

The United States Department of Agriculture（USDA） has created a nutritional food pyramid（金字塔）. It shows the daily number of servings you should eat from five food groups. The food pyramid has four levels. The base of the pyramid is the largest level. It contains the bread, cereal, rice, and pasta group from which you need six to eleven servings. The next level has two food groups: vegetables and fruits. The USDA recommends three to five servings of vegetables and two to four servings of fruit. The third level also has two groups: the milk, yogurt, and cheese group and the meat, poultry, fish, dry beans, eggs, and nuts group. You need two to three servings from each of these groups. The top of the pyramid is the smallest level. It contains fats, oils, and sweets. These foods have few nutrients, so eat them sparingly（有节制地）.

小题1:What is the main idea for this passage_________?

A．Eating a balanced diet gives your body the energy it needs.

B．The top of the pyramid is the smallest level.　　　　

C．Meat, poultry, fish, dry beans, eggs, and nuts are on the third level.

D．We should have a nutrition food pyramid.小题2:The first paragraph suggests that __________?

A． food is something that cleanses your body.

B．food can improve the quality of your life.

C．food should be eaten at night as well as during the day.

D．food will make it easier for you to exercise.小题3:By eating a balanced diet, your body gets the      important nutrients it needs.

A．four

B．five

C．six

D．seven小题4:A balanced diet________.

A．is made up of foods from five food groups.

B．includes many foods containing fat.

C．includes six to eleven servings of fruit.

D．can be got by taking vitamins.小题5:To help the reader understand the six nutrients needed by the body, the author________.

A．describes the five basic food groups.

B．explains what a balanced diet is.

C．writes the details of each nutrient.

D．tells the number of daily servings needed from each food group.

脑脊液的pH比动脉血低的原因是（）

A.CO₂易透过血脑屏障

B.HCO^-₃易透过血脑屏障

C.Cl^-易透过血脑屏障

D.Na⁺易透过血脑屏障

E.H⁺易透过血脑屏障