单项选择题

某砼输送泵每小时纯工作状态可输送砼25m3,泵的时间利用系数为0.75则该砼输送泵的产量定额为（）。

A.150m3/台班
B.0.67台班/100m3
C.200m/台班
D.0.50台班/100m

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不同的学生对自己心目中好老师的标准有所不同，但也有共同之处。请你根据下列表格中的内容以Good Teachers in Our Heart为题，写一篇120词左右的英语短文。约40%的同学认为：对学生友好上课认真约60%的同学认为：知识渊博；讲课清晰一致认为：严格要求学生，又善于帮助学生解决问题；风趣幽默，上课生动有趣。Good Teachers in Our HeartGood teachers are those who are popular with students. But what kind of teachers are popular with students? Different students have different opinions about this question.

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SECTION A MINI-LECTUREDirections: In this section you sill hear a mini-lecturE.You will hear the lecture ONCE ONLY. While listening, take notes on the important points. Your notes will not be marked, but you will need them to complete a gap-filling task after the mini-lecturE.When the lecture is over, you will be given two minutes to check your notes, and another ten minutes to complete the gap-filling task on ANSWER SHEET ONE.Use the blank sheet for note-taking.听力原文： Good morning, everyonE.Today, we are going to talk about 'American' characteristics. Many typically 'American' characteristics--individualism, self-reliance, informality, punctuality and directness-are a result of those values mentioned earlier. Other 'national traits' could also be identified, however.1. Americans cooperate-Although often competitivE.Americans also have a good sense of 'teamwork' and cooperate with others to achieve a goal.2. Americans are friendly, but in their own way. In general, friendships among Americans tend to be shorter and move casual than friendships among people from other cultures. This has something to do with American mobility and the fact that Americans do not like to be dependent on other peoplE.Americans also tend to compartmentalize friendships-having friends at work, family friends, friends on the softball team, etC..3. Americans ask a lot of questions, some of which may to you seem pointless, uninformed or elementary. Someone you have just met may ask you very personal questions. No impertinence is intended; the questions usually grow out of a genuine interest.4. Americans tend to be internationally naive-Many Americans are not very knowledgeable about international geography or world affairs, they may ask uninformed questions about current events and may display ignorance of world geography. Because the U.S. is not surrounded by many other nations, some Americans tend to ignore the worlD.5. Silence makes Americans nervous. Americans are not comfortable with silencE.They would rather talk about the weather than deal with silence in a conversation.6. Americans are open and usually eager to explain. If you do not understand certain behavior. or want to know 'what makes Americans tick,' do not hesitate to ask questions.Just as values and traits differ somewhat from one culture to another, so do the personal habits associated with good manners and courtesy. While very often there does not seem to be any particular reason why a particular way of doing something is considered good manners, observing these cultural rules will make Americans more comfortable with you and therefore you with them, it is, of course, impossible to cover all the possibilities herE.If you are unsure in a situation, just ask--Americans like to be helpful.1. Queuing up or lining up is essential. Courtesy requires that you do not push from behind, stand nest to the person being helped or cut into a linE.If you should accidentally bump someone, you should say, 'Excuse mE.'2. Americans blow their noses into a tissuE.Spitting, clearing phlegm or sniffing as from a cold are considered rudE.3. It is considered poor manners to slurp, chew noisily or open your mouth while chewing.4. Questions are seen as a good way of getting acquainted, but questions about a person's age, financial affairs, cost of clothing or personal belongings, religious affiliations and sex life are considered too personal for questioning except between very close friends.5. Men generally do not hold hands or link arms in public with other men. This is somewhat acceptable between women and quite common between men and women.Now, a few words about personal safety. Unfortunately, in the U.S. one must be aware of crimes. It is wise to be especially careful until you are familiar with the community in which you livE.Remember t

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