当二氧化碳在空气在空气中含量达（）时，燃烧熄灭。A、30%～50% B、60%～70
题型：单项选择题
问题：
当二氧化碳在空气在空气中含量达（）时，燃烧熄灭。
A、30%～50%
B、60%～70%
C、70%～80%
D、80%～90%
题型：单项选择题
| 看图并阅读短文，完成后面的题目。 | |||
 This is my 1___________. It's 2___________. There is a 3___________ beside the wall. My bag is 4___________ the bed. It's 5___________. There is a phone on the 6___________. The boy 7___________ on my bed is my elder brother. My 8___________ is on the floor. My brother and I like 9___________ in my bedroom. He 10___________ playing with me. 根据图片和上下文内容选词填空。
( ) 11. My bedroom is very clean and tidy. ( ) 12. The computer is on the bed. ( ) 13. I'm sitting on the bed now. ( ) 14. The phone is on the end table. ( ) 15. There is a big bag on the bed. |