皮皮学，免费搜题
登录
搜题
【单选题】
铜的冶炼工业中：焙烧的主要反应为①2CuFeS 2 +4O 2 ====Cu2S+3SO 2 +2FeO(炉渣)；制粗铜时，在1200℃发生的主要反应为②2Cu 2 S+3O 2 ====2Cu 2 O+2SO 2 和③2Cu 2 O+Cu 2 S====6Cu+SO 2 ↑。下列说法错误的______。
A.
由6mol CuFeS 2 生成6molCu，上述共消耗15mol O 2
B.
制粗铜时，Cu 2 S在1200℃反应作还原剂
C.
在反应2Cu 2 O+Cu 2 S====6Cu+SO 2 ↑中，电子转移总数是6e -
D.
反应2CuFeS 2 +4O 2 ====Cu 2 S+3SO 2 +2FeO中，SO 2 既是氧化产物，又是还原产物
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
【判断题】Plc是可编程控制器简称。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Dear Bill, I am happy to hear ________ you.
A.
with
B.
about
C.
from
查看完整题目与答案
【简答题】完形填空。 Dear Mum, I am happy here. I have 1 new friends. They are Jill and Bill. Jill is twelve. She comes 2 the USA. Bill is twelve, too. He is 3 . 4 are polite and helpful. We are all good friends. Af...
查看完整题目与答案
【单选题】Dear Bill,I am happy to hear you.
A.
of
B.
about
C.
from
查看完整题目与答案
【简答题】阅读理解。 Dear Sir / Madam, I am the Bill and Exchange (assistant) Manager of the African Development Bank, MR. JOSEPH YANA. In my department I discovered an abandoned sum of USD$9.900.000 in an account t...
查看完整题目与答案
【单选题】—Oh，dear ! Bill, come here !Our little son ate a pill mistake again． —He must have thought it is candy．I've told you a hundred times to hide the medicinekids
A.
with；to
B.
by；towards
C.
in；for
D.
by；from
查看完整题目与答案
【简答题】Dear Bill, I’m glad to receive your letter,thank you for your caring for the weather and my health.But I am sorry to tell you that I have to stay at home because of the heavy fog and haze . Since the ...
查看完整题目与答案
【单选题】下面关于城市地理位置的说法正确的是( )。
A.
城市地理位置影响不到城市职能性质的特殊性
B.
城市地理位置指一个城市在地球上广阔区域中所处的地理纬度位置
C.
城市地理位置是城市及其外部的自然、经济、政治等客观事物在空间上相结合的特定点；城市地理位置的特殊性，往往决定了城市职能性质的特殊性和规模的特殊性。
D.
城市地理位置仅指城市距交通干线的距离
查看完整题目与答案
【单选题】----Why didn’t you come to meet me, Bill? ----Sorry, dear. But I really forgot where I was _____ to meet you.
A.
demanded
B.
supposed
C.
delighted
D.
squeezed
查看完整题目与答案
【简答题】 Dear Bill, Thank you for all of your kindness.I really enjoy staying at                   1. your home for one month.Would you like very much visit                           2. me in Beijing in next...
查看完整题目与答案
相关题目：
【判断题】Plc是可编程控制器简称。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Dear Bill, I am happy to hear ________ you.
A.
with
B.
about
C.
from
查看完整题目与答案
【简答题】完形填空。 Dear Mum, I am happy here. I have 1 new friends. They are Jill and Bill. Jill is twelve. She comes 2 the USA. Bill is twelve, too. He is 3 . 4 are polite and helpful. We are all good friends. Af...
查看完整题目与答案
【单选题】Dear Bill,I am happy to hear you.
A.
of
B.
about
C.
from
查看完整题目与答案
【简答题】阅读理解。 Dear Sir / Madam, I am the Bill and Exchange (assistant) Manager of the African Development Bank, MR. JOSEPH YANA. In my department I discovered an abandoned sum of USD$9.900.000 in an account t...
查看完整题目与答案
【单选题】—Oh，dear ! Bill, come here !Our little son ate a pill mistake again． —He must have thought it is candy．I've told you a hundred times to hide the medicinekids
A.
with；to
B.
by；towards
C.
in；for
D.
by；from
查看完整题目与答案
【简答题】Dear Bill, I’m glad to receive your letter,thank you for your caring for the weather and my health.But I am sorry to tell you that I have to stay at home because of the heavy fog and haze . Since the ...
查看完整题目与答案
【单选题】下面关于城市地理位置的说法正确的是( )。
A.
城市地理位置影响不到城市职能性质的特殊性
B.
城市地理位置指一个城市在地球上广阔区域中所处的地理纬度位置
C.
城市地理位置是城市及其外部的自然、经济、政治等客观事物在空间上相结合的特定点；城市地理位置的特殊性，往往决定了城市职能性质的特殊性和规模的特殊性。
D.
城市地理位置仅指城市距交通干线的距离
查看完整题目与答案
【单选题】----Why didn’t you come to meet me, Bill? ----Sorry, dear. But I really forgot where I was _____ to meet you.
A.
demanded
B.
supposed
C.
delighted
D.
squeezed
查看完整题目与答案
【简答题】 Dear Bill, Thank you for all of your kindness.I really enjoy staying at                   1. your home for one month.Would you like very much visit                           2. me in Beijing in next...
查看完整题目与答案