Is oxygen the only gas ( ) helps fire burn?
that
本题目来自[网课答案]本页地址：https://www.wkda.cn/ask/tyyyjxxppeyxoo.html
举一反三
- Lily’s house is _________. A: On fire B: on the fire C: burn D: in fire
- FIRE的含义____;BURN的含义____
- They kept the fire ____ to keep them warn. A: burn B: to burn C: buring D: burned
- 1. The gas with maximum percentage in the atmosphere is .(Nitrogen / Oxygen)
- Every gallon of gas you save not only helps your budget, but also keeps a certain amount of carbon dioxide out of the atmosphere. The chinese meaning of the word underlined in the sentence is .
内容
- 0
When<br/>some fruits emit (),<br/>it causes other fruits to ripen. A: ammonia<br/>gas B: oxygen<br/>gas C: ethylene<br/>gas D: nitrogen<br/>gas
- 1
Now my house is less drafty and it helps a bit with the gas bill.
- 2
The gas with maximum percentage in the atmosphere is ( ). A: nitrogen B: hydrogen C: oxygen D: carbon dioxide
- 3
The China-Myanmar oil and gas pipeline project helps China in ensuring energy safety for it ______.
- 4
A ______ refers to an injury caused by heat, fire or radiation, etc. A: amputation B: pain C: stroke D: burn