搜题请搜索小程序“爱下问搜题”
问题 多项选择题

工业三废包括下列（）。

A.废气

B.废水

C.废渣

D.废铁

E.废塑料

答案

参考答案：A, B, C

完形填空
完形填空。
Dear Helen,
     Today is Sunday. I  1  go to school. I stay  2  home. I'm writing to you now. I go to school  3  seven
thirty every morning. We have four lessons  4  the morning. We read and write Chinese  5  school.  6  forty
students in my class. Four  7  them are Americans, two Englishmen, five Frenchmen and two Australians.
The other students are Chinese. Chinese people are  8 . There  9  a map of China  10  the white wall in our
classroom. China is great. My classmates are all friends. They teach us Chinese. I teach them English. We
play football in the afternoon. We are very happy! Please write to me soon.
                                                                                                                                       Yours,
                                                                                                                                        Lucy
( )1. A. do       
( )2. A. in       
( )3. A. at       
( )4. A. at       
( )5. A. under   
( )6. A. There be 
( )7. A. on       
( )8. A. friendly 
( )9. A. be       
( )10. A. in      		B. don't  
B. on     
B. near   
B. with   
B. with   
B. There is
B. of     
B. friend 
B. are   
B. on      		C. can      
C. at      
C. behind  
C. on      
C. about    
C. There are 
C. in      
C. friends  
C. is      
C. with     		D. can't 
D. of    
D. about 
D. in    
D. at    
D. Have  
D. at                           
D. love  
D. am    
D. about 
查看答案
选择题

下列化合物中，铁元素质量分数最小的是（　　）

A．FeO

B．Fe2O3

C．Fe3O4

D．FeS
查看答案