关于型砂透气性,错误的是()。A.粒度粗透气性好 B.水多透气性好 C.紧实度高透气

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问题:

关于型砂透气性,错误的是()。

A.粒度粗透气性好

B.水多透气性好

C.紧实度高透气性差

考点:型砂工型砂工题库
题型:单项选择题

小鹏家买了许多的蜂窝煤球,就沿着墙角边依次垒放起来,时间一长,小鹏发现墙壁被煤球染黑了,小鹏拿鸡毛掸子刷,但无济于事,经过仔细观察,小鹏才发现墙壁并不是表面上变黑了,而是墙壁里面也变黑了.这是同学们所学过的______现象造成的.

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如图是禁止机动车驶入标志。

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Now, it’s time for some brief news items.

Teens Go Online

Some 13 million European children under 18 use the Internet for schoolwork, games and music according to research done by Nielsen’s “Net-rating”. The study covered Britain, Germany, France, Italy and Spain. Experts advesed parents to limit the time their kids on line and keep them away from chat rooms.

Chat to the magic Mum

British author J.K.Rowling, mother of magic boy Harry Potter, will do an Internet interview about her new bool”Harry Potter and the Half-Blood Prince”on June 26. Before the event, children are invited to send their questions about Harry to the website. The book will hit stores in the US and UK on June 21 and will arrive in China in August.

School Soldiers

Russian school students will have to do basic military training in their final year of school, the government has decided.The lesson will include learning to fire guns, marching drills and how to deal with a chemical, nuclear or biological attack. The activity is seen as part of a drive toward the education of their love for their country.

Is it hard for you to get up early and get ready for classes? Some students at Winter Park High School just roll our of bed in their pajamas(睡衣) and go to class in their own bedrooms. Of course, their teachers and classmates do not see them because all their class work is on the computer. The Florida High School, the state’s only online school, had 250 students who are taking classed at home by computer. Students in this first online program take classed in algebra(代数), American government , chemistry, computer, economics, and web-page design. They also have to go to regular school to attend other classes.

66.In the first news item, which country is NOT covered in the research?

A.Britain.  B.France.  C.Sweden.        D.Spain.

67.Why will Russian school students have basic military training?

A.To get ready for a milirary parade.       B.To learn to protect themselves.

C.To gain some military knowledge.        D.To develop their love for the country.

68.About Florida High School, which of these facts is true?

A.Some of the students have to attend classed at home instead of in the school.

B.There are altogether 250 students who take classes in the classrooms.

C.As the state’s only online school, it has 250 students who take classes by computer.

D.Students can’t take classes in algebra, American government, chemistry, computer and so on.

69.The news from Florida can be given a title”        ” .

A.Get up Lage                  B.Online School 

C.Magical Computers           D.No Teachers

70.What is the second news item mainly about?

A.J.K.Rowling will have an Internet interview.

B.Children will meet Harry Potter’s mother.

C.The Harry Potter book will be available on the Internet.

D.The Harry Potter book will arrive in China in early June.

题型:单项选择题

由于挂齿挂错,容易造成()。

A.螺纹的齿高全部不正确

B.螺纹的螺距全部不正确

C.螺纹的表面精度偏差

D.螺纹的牙形角全部不正确

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企业申请贷款可能是由于()。

A.销售增长

B.营业周期减慢

C.购买固定资产

D.其他资金支出

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