问题
单项选择题
通常所说的天然气是指天然生成的（）气体。
A.所有
B.甲烷
C.烷类
D.烃类
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
通常所说的天然气是指天然生成的（）气体。
A.所有
B.甲烷
C.烷类
D.烃类
参考答案：A
Questions 11-15
· Look at the charts below. They show company sales.
· Which chart does each sentence (11-15) describe
· For each sentence, mark one letter (A-E) on your Answer Sheet.
· Do not use any letter more than once.
|
Sales fell on 2007 and rose again to reach the 2006 sales.
