搜题请搜索小程序“爱下问搜题”
问题 选择题

下列化学方程式书写正确的是（　　）

A．2Cu+O2

  △  
.
 
2CuO

B．S+O2═SO2

C．C+O2

点燃
CO

D．C+2CuO

△
CO2↑+2Cu

答案

A、应用的原理正确，化学式书写正确，也满足质量守恒定律，故A正确，

B、硫和氧气的反应需要进行点燃，正确的方程式为：S+O2

 点燃 
.
 
SO2 ，故B错误，

C、方程式的书写需要进行配平，正确的方程式为：C+O2

 点燃 
.
 
2CO，故C错误，

D、碳和氧化铜的反应条件是高温，正确的方程式为：2CuO+C

 高温 
.
 
2Cu+CO2↑，故D错误，

故选A．

阅读理解
阅读理解。
Sandy: 
     I am going to have a party next weekend. Are you coming?
                                                                                                         Grace
Sandy:
     I found a new kind of dog food. My dog Tim just loves it. Would you get some for
your dog Lucky?
                                                                                                            Wu
Sandy:
     Mr. Brown said your car was ok. And now you can go and get it from 9:00 a.m.
to 5:00 p.m.
                                                                                                           Steve
Sandy:
     The nice movie "The Ship" is on show at Present Theater. Want to see it?
                                                                                                          Chris
Sandy:
     Ring me up, and buy some bread on your way home.
                                                                                                           Sue
1. Grace is going to have a party _______.
A. this weekend
B. this Friday
C. next weekend
D. next month
2. "The Ship" is ______.
A. a book
B. a movie
C. a song
D. a ball game
3. Mr. Brown helped Sandy examine her _______.
A. car
B. telephone
C. dog
D. ship
4. Tim and Lucky are _______.
A. movies
B. women
C. food
D. dogs
5. ______ may be a member of Sandy's family.
A. Grace
B. Wu
C. Sue
D. Steve
查看答案
选择题

She became a________customer of the bookshop.[ ]

A. considerate  

B. regular

C. continuous  

D. constant
查看答案