皮皮学，免费搜题
登录
搜题
【单选题】
某无色气体可能由CH 4 、NH 3 、H 2 、CO、CO 2 和HCl几种气体组成，在恒温恒压条件下，将此混合气体通过浓H 2 SO 4 时，总体积基本不变，通过澄清石灰水，未见变浑浊，继续通过Ba（OH） 2 溶液，产生白色沉淀．把剩余气体导出后，在氧气中能点燃，燃烧产物不能使CuSO 4 粉末变色．则原混合气体的成份是（ ）A.
HCl和CO
B.
HCl、CO 2 和CO
C.
CO和CH 4
D.
HCl、CO 2 和CH 4
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Have you worked there long?
A.
Yes, I have worked there for more than fifteen years.
B.
I am bored.
C.
I like my job very much.
D.
I don't know.
【单选题】As you worked late yesterday,you_________have
A.
19. As you worked late yesterday,you_________have comethis morning. ( 全国 2) A.mayn’t
B.
can’t
C.
mustn’t
D.
needn’t
【单选题】—Have you worked here since you graduated? —No, I ____________at a factory in Beijing for six years.
A.
would work
B.
have worked
C.
had worked
D.
worked
【单选题】( ) you have worked out the hard problem, you shall have a rest first.
A.
By now
B.
Ever since
C.
Now that
D.
In that
【简答题】学生注意转移快慢的标志是速度，速度受哪些方面的因素影响?
【简答题】物权法、民法关于财产权利界定的物质基础是什么?
【简答题】If you have worked hard all day, you feel like this. t______
相关题目：