问题
选择题
能使带火星木条复燃的气体是 [ ]
A.空气
B.二氧化碳
C.水蒸气
D.氧气
答案
答案：D
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能使带火星木条复燃的气体是 [ ]
A.空气
B.二氧化碳
C.水蒸气
D.氧气
答案：D
| Read and choose. 补全对话。 |
| A: Hello! 1 B: This is Sam. Who's that? A: This is Kate. 2 this evening? B: I am going to play basketball. 3 A: Yes, but 4 | A. Would you like to go with me? B. I need to ask my mum. C. May I speak to Sam? D. See you soon. E. What are you going to do? |