向日葵的一个花盘是()。 A.一朵两性花 B.一朵单生花 C.一个花序 D.一朵

题型:选择题

问题:

向日葵的一个花盘是(    )。

A.一朵两性花

B.一朵单生花

C.一个花序

D.一朵花

考点:传粉和受精开花与花的结构果实和种子的形成
题型:选择题

在SQL-SELECT语句中,检查一个属性值是否属于一组给定的值中的特殊运算符是 【12】

题型:选择题
完形填空
       Today is Saturday, Ann    1   to school. Her parents Mr King and Mrs King    2   to work. They want
to go to the Haishan Park. The park is near their house, so they   3    to the park. It's 9 o'clock now. There are    4   people in the park. Some people chat(聊天).Some people    5   .Some people sing. There are a
lot of good places to   6    fun in the park. Ann plays on the merry-go-round(旋转木马)    7    other boys
and girls. Mr King     8   in the sports club. Mrs King dances in the music club. They   9    it's very   10    .
( )1. A. don't go      
( )2. A. don't go      
( )3. A. takes a walk    
( )4. A. no              
( )5. A. play the guitar
( )6. A. having          
( )7. A. having          
( )8. A. plays tennis    
( )9. A. think          
( )10. A. relax          
B. doesn't go    
B. doesn't        
B. take a walk    
B. many            
B. play guitar    
B. have            
B .and            
B. play the tennis
B. thinks          
B. relaxing        
C. not go          
C. not go          
C. takes the walk  
C. a lots of        
C. plays the guitar
C. has              
C. with            
C. plays the tennis
C. thinking        
C. relaxed          
D. goes                
D. go                  
D. take the walk        
D. lot of              
D. plays guitar        
D. enjoy                
D. or                  
D. play tennis          
D. look                
D. boring              
题型:选择题

在线段、射线、角、直角三角形、等腰三角形中,是轴对称图形的有_____个;

题型:选择题

一组数据1,3,2,5,x的平均数是3,则数据的方差为[ ]

A.4

B.100

C.2

D.10

题型:选择题

制造业,虽然是很多国家增长的引擎,但却未必是就业增长的引擎。事实上,制造业几乎从来都______最主要的创造就业的部门。大多数国家,在工业化之前,农业是最主要的就业吸收者,______在工业化之后,服务业______是最主要的就业吸收者。 填入横线部分最恰当的一项是( )。

A.是 但 却

B.不是 因此 更

C.是 因而 则

D.不是 而 则

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