由（）方式构成的库存管理是供应物流的核心部分。A．定量订货与定期订货 B．传统的经济

下列有关我国民族的叙述,正确一项是  （  ）

A．在55个少数民族中人口最多的是回族

B．少数民族主要分布在东南、东北和西北

C．我国的民族分布特点是大杂居、小聚居

D．蒙古族的传统节日是泼水节，跳长鼓舞

阅读理解

     Children start out as natural scientists, eager to look into the world around them.Helping them enjoy

science can be easy；there's no need for a lot of scientific terms or expensive lab equipment.You only

have to share your children's curiosity.Firstly, listen to their questions.I once visited a classroom of s

evenyearolds to talk about science as a job.The children asked me" textbook questions" about schooling,

salary and whether I liked my job.When I finished answering,we sat facing one another in silence.Finally I

said, "Now that we're finished with your lists, do you have questions of your own about science?"

      After a long pause, a boy raised his hand, "Have you ever seen a grasshopper(蚱蜢) eat? When I try

eating leaves like that,I get a stomachache.Why?"

     This began a set of questions that lasted nearly two hours.

      Secondly, give them time to think.Studies over the past 30 years have shown that, after asking a

question, adults typically wait only one second or less for an answer,no time for a child to think.When

adults increase their " wait time" to three seconds or more, children give more logical, complete and

creative answers.

      Thirdly, watch your language.Once you have a child involved in a science discussion, don't jump in

with "That's right" or" Very good". These words work well when it comes to encouraging good behavior.

But in talking about science, quick praise can signal that discussion is over.Instead, keep things going by

saying" That's interesting" or" I'd never thought of it that way before", or coming up with more questions or ideas.

     Never push a child to"Think",It doesn't make sense.Children are always thinking, without your telling

them to.What's more, this can turn a conversation into a performance.The child will try to find the answer

you want,in as few words as possible, so that he will be a smaller target for your disagreement.

     Lastly, show; don't tell.Reallife impressions of nature are far more impressive than any lesson children

can learn from a book or a television program.Let children look at their fingertips through a magnifying

glass (放大镜), and they'll understand why you want them to wash before dinner.Rather than saying that

water evaporates (蒸发), set a pot of water to boil and let them watch the water level drop.

1. According to the passage, children are natural scientists, and to raise their interests,the most important

thing for adults to do is________.

A. to let them see the world around

B. to share the children's curiosity

C. to explain difficult phrases about science

D. to supply the children with lab equipment

2. In the last sentence of the first paragraph, the word" lists" could best be replaced by ________.

A. any questions                

B. any problems

C. questions from textbooks    

D. any number of questions

3. According to the passage, children can answer questions in a more logical, complete and creative way if adults________.

A. ask them to answer quickly

B. wait for one or two seconds after a question

C. tell them to answer the next day

D. wait at least for three seconds after a question

4. In which of the following paragraph(s) does the author tell us what to say to encourage children in a science discussion?

A. The second and third.  

B. The fourth and fifth.

C. The fifth and sixth.  

D. The seventh.

压铸模的加热与冷却系统有何作用？

电子商务对物流的影响有哪些？