计算:3333×6666=______.

题型:填空题

问题:

计算:3333×6666=______.

考点:运算定律和简便算法
题型:填空题

阅读下列短文,选择正确答案。

     Peter and I are good friends. Peter is an American boy. I am a Japanese girl. He is thirteen. I am

twelve. We are in the same class,Class Two.

     Peter has a nice clock. He likes it very much. He puts it on his desk. Every morning it wakes him

up(叫醒他). I have a new watch. It looks beautiful. I wear(戴)it everyday. It tells me the time. It helps

(帮助)me a lot in my daily life. I can not live without it. 

1. Peter and I are _____. 

A. friends      

B. teachers      

C. sisters      

D. brothers

2. Peter is _____. 

A. an English boy                

B. a Japanese girl    

C. an American boy              

D. an English girl

3. I have _____. 

A. a beautiful clock              

B. an old watch    

C. a new watch                  

D. a nice clock

4. Peter _____. 

A. wears his clock everyday        

B. puts his clock on his desk

C. wears his new watch every day  

D. likes his new watch very much

5. Peter and I are_____.   

A.in different classes            

B.in the same row    

C.in Class Two                  

D.in America

题型:填空题

99mTc标记硫胶体不可用于下列哪种显像()。

A.骨髓显像

B.肝脾显像

C.脾脏显像

D.下肢静脉显像

E.淋巴系统显像

题型:填空题

图A是元素周期表的一部分(图B是相关示例).

回答下列问题:

(1)原子序数为17的元素名称为______;

(2)图C是某元素的原子结构示意图,该元素在图A中的位置是(选填①或②或③)______;

(3)图D是氧元素的原子结构示意图,图A中与氧元素在同一纵行的硫元素其原子结构与氧原子相似.由此推测,硫原子在化学反应中易(填“得”或“失”)______电子.

题型:填空题

若地形图比例尺为1:1000,等高距为1m,要求从A点至B点选择一条坡度不超过5%的路线,则相邻等高线间的最 * * 距应为( ),图上距离应为( )。

A.20m,1cm

B.10m,1cm

C.10m,2cm

D.20m,2cm

题型:填空题

数据挖掘所得到的信息应();();()特征。

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