-9的相反数是( ) A.-19 B.19 C.-9 D.9

题型:选择题

问题:

-9的相反数是(  )
A.-
1
9
B.
1
9
C.-9D.9
考点:相反数
题型:选择题

伤寒的并发症肠穿孔和肠出血常发生在

A.病程第四周

B.病程第三周

C.病程第一周

D.病程第二周至第三周

E.病程第二周

题型:选择题

阅读理解。

     Lucy is English. She is ten. She is a student. She is in Class Five, Grade Seven. Her teacher is Linda. She

is young. Her bedroom is very nice. In her bedroom (卧室) you can see a bed, a table, a sofa, a map, a cat

and some flowers. The bed is red. The table and the chair are yellow. The cat is black. It's under the bed.

There is a map of China. It's on the wall (墙).

1. Lucy is a student, she is _____.

A. English

B. American

C. Chinese

2. Her teacher is _____.

A. a man

B. a girl

C. a woman

3. Is the bed brown or red?

A. No, it isn't.

B. It's red.

C. It's brown.

4. What color is the cat under the bed? 

A. Black.

B. White.

C. Yellow.

5. Where is the map of China?

A. On the table.

B. Behind the door.

C. On the wall.

题型:选择题

简述官府文移的稽察机构。

题型:选择题

用V形架装夹圆柱形工件,当工件直径有变化时,工件的中心(轴线)只在V形块的角平分线上变动。

题型:选择题

唐代画家戴嵩曾作《斗牛图》,因其形象生动逼真,技法炉火纯青,一直被视作珍品。一次此画被告一牧童瞧见,牧童大笑道:“两牛相斗,从来都是尾巴紧贴屁股下面,哪有尾竖朝天。”《斗牛图》终于失去了存在的价值。牧童知道两牛相斗从来都是尾巴紧贴屁股下面,这说明了()

A.实验是认识发展的动力量对比

B.实践是认识的来源

C.实践是检验认识的真理性的唯一标准

D.实践是认识的目的和归宿

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