西北菜是怎样的地方菜

某企业与银行商定的周转信贷额为200万元，承诺费率为0．5％，企业借款150万元，平均使用8个月，借款年利率为4％，那么，借款企业向银行支付年承诺费和利息共计（）万元。

A．4

B．4．5

C．0．5

D．5．5

我市九嶷山景区溶洞多，紫霞岩就是其中之一，洞内的钟乳石千姿百态，形成这些溶洞的“主角”是碳酸钙、二氧化碳和水．石灰石中的碳酸钙遇到溶有二氧化碳的水，会生成碳酸氢钙，而溶解在水中的碳酸氢钙，如果受热或大气压强变小，就会转化为碳酸钙、二氧化碳和水，不溶于水的碳酸钙与其它不溶性物质一起沉积下来，经长时间聚积就形成了美丽的钟乳石．试回答：

（1）钟乳石属于______．（填“混合物”或“纯净物”）

（2）钟乳石的形成过程中碳酸氢钙转化为碳酸钙的化学方程式为______．该反应属于______反应（填基本反应类型）．

阅读理解。

     CHILDREN are the future. In 2060,today's children will be parents,grandparents and possibly even

great-grandparents.

     Those still alive in Valdosta,Georgia in 2060 will be able to share a part of their youth with the youth

of the day, when the city's time capsule (时间胶囊) is dug up in Drexel Park.

      Students from the Valdosta City School System have had a hand in collecting information that will be

placed in the time capsule.

      Kindergarten to the second graders studied transportation (交通). Third through fifth graders looked

at the technology of today.  Sixth through eighth focused on (关注) music and entertainment.  Ninth

through twelfth graders went to

work on fashion and food.

       Students were asked to make a scrapbook (剪贴簿)  page recording their specific (特定的)  area.

       The high school pages are a wonder of color and design.

       Many students detai1(详述)  the food of the moment.  Susanna Sin,16,includes the local. restaurants.  " People will want to know what is here,and maybe it will be here then," said Sin,an 11th grader. Sin

doubts that much will change

in 50 years. Teenagers will still want to hang out with friends,and people will still be searching for the things that make them happy,she said.

       Education,however,would be completely different,she added. Technology will be even more

important in the lives of students in 2060.

       Katherine Wakeley,16,said the scrapbook would give the people of 2060 a chance to see what

was popular in  2010 , especially where fashion was concerned (相关的). " Skinny jeans and rips  in

your pants are the biggest things , "Wakeley said.

       The hugely popular Glee television show,as well as teenage superstars Miley Cyrus and the Jonas

Brothers,is also mentioned in the scrapbook.

       Though fashion,music and movies will change. Wakeley doesn't believe that Valdosta will ever let go

of its greatest passion-football.

       "It'll still be here," Wakeley said.

       All the students said it would be interesting to see the capsule opened,but the teenage dreaming of

escaping the hometown stopped them from saying they would be here to see it in 2060.

       But "it would be cool to see them open it," Greenhaw said.

1. What is the article mainly about? 

A. What today's youth want to share with the young people of the future.

B. The possible changes in Valdosta over the next 50 years.

C. The most popular things for children in Valdosta in 2010.

D. Children in Valdosta collecting information for a time capsule.

2.  Which of the following pieces of information has been chosen for the time capsule?

A. Baggy jeans.                                  

B. Famous hotels.

C. The Jonas Brothers.                          

D. Best US inventions in 2010.

3. According to the article,what may be unchanged in 2060?

A. The dream of escaping hometown.              

B. The passion for football.

C. The lifestyle of the city.                    

D. Education.

4.  Which of the following statements is TRUE according to the article?   

A. Sin believes that much will change over the next 50 years.

B. People are more interested in knowing what life will be like in 50 years' time than in the past.

C.  Different graders have been set the tasks of finding different kinds of information.

D.  Most students have promised to come back for the 2060 0pening of the capsule.

下列哪项不是乳发的发生原因

A．产后劳伤精血

B．肝气郁结，郁久化火

C．房劳伤肾

D．饮食不节，脾胃湿热

E．乳痈火毒炽盛

以下几种传动带，在正常情况下传动效率最高的是（）。

A.平带

B.普通V带

C.窄V带

D.同步带