已知数阵a11a12a13a21a22a23a31a32a33中,每行的三个数依

题型:选择题

问题:

已知数阵
a11a12a13
a21a22a23
a31a32a33
中,每行的三个数依次成等差数列,每列的三个数也依次成等差数列,若a22=4,则所有这九个数的和为(  )
A.16B.32C.36D.40
考点:等差数列的定义及性质
题型:选择题
儿童的负重最好不要超过体重的
3
20
.如果长期背负过重的物体,会导致腰痛及背痛,严重的甚至会妨碍骨骼生长.假设你的体重为45kg,那么你的书包最好不要超过多少Kg?当你的书包重5kg时,超重了吗?为什么?
题型:选择题

阅读理解。

     As students and teachers returned to school on Monday after the publication of performance ratings

(等级) for 18,000 teachers, many parents said they were giving the reports serious thought. Yet there

was an equal measure of skepticism among parents that test scores have any relationship with teachers'

competence.

     Some said they already knew how good a teacher was by walking into the classroom or by

monitoring their children's progress. "I'm the kind of person who likes to see for themselves," a father in

Queens said.

Others worried about how their fellow parents, perhaps ones with sharper elbows, might respond. Will

they demand a new teacher? Move their children to a new school?

     Elizabeth Sane, the mother of a fourth grader at the Ella Baker School, a kindergarten-through-eighth-

grade school on the Upper East Side, said that her daughter was switched to a different teacher's class

over the summer, and that it was "like adding salt to the wound" when she saw the high ratings for her

daughter's previous teacher. Her daughter's teacher this year did not receive a rating because he

previously taught high school.

     Ms. Sane said that the rating was not the only factor that influenced how she assessed a teacher's

performance, but that the data used for teacher evaluations mattered.

But other parents dropping their children off at the Ella Baker School said they did not trust teacher

ratings based on test scores any more than they wanted their children's learning measured only by the

state exams.

    "Some people take it as the final word, but it doesn't change who they are as teachers. The ratings

aren't accurate, and the whole student testing thing needs to be thrown out," said Lydia Delgado, whose

child is in the second grade.

1. Paragraph 1 tells us that          

A. All the teachers received a rating given by the students.

B. All the teachers will receive a rating at the end of each semester,

C. Most parents took the teachers' ratings seriously.

D. About half of the parents doubted the ratings to be reliable.

2.What does the underlined part "with sharper elbows" mean?

A. With the ability to change the situation.

B. With a good relationship with the school.

C. With a stong will to succeed.

D. With strong elbows physically.

3.Paragraph 4 shows that Elizabeth Sane         

A. was on the side of giving ratings to the teachers.

B. regretted having sent her daughter to another class.

C. didn't think her daughter's previous teacher was better.

D. wanted her daughter to return to her previous class.

4. Which of the following statements is true?

A. The teacher ratings were decided by the test scores of the students.

B. Ms. Sane evaluated a teacher's performance only by the rating.

C. Lydia Delgado didn't think the students' scores should be kept.

D. To give ratings to teachers will come to an end in the near future.

5.The attitude of the author towards the way to assess teachers' competence is       .

A. supportive        

B. critical

C. indifferent        

D. objective

题型:选择题

在施工图预算审查的方法中,()是能较快发现问题的一种方法。

A.逐项审查法

B.分组计算审查法

C.对比审查法

D.“筛选”审查法

题型:选择题

全向停车法

题型:选择题

下边漫画揭示的哲理是()

①要用正确的价值观指引人生

②价值判断应基于价值选择

③价值判断往往是因人而异的

④价值判断超越社会历史条件

A.①②

B.③④

C.①③

D.②④

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