试题与答案

(1)写出以石墨为电极,H2、O2、Na2SO4溶液构成的燃料电池的电极反应式:

题型:问答题

题目:

(1)写出以石墨为电极,H2、O2、Na2SO4溶液构成的燃料电池的电极反应式:负极:______;正极:______

(2)写出以石墨为电极,H2、O2、H2SO4溶液构成的燃料电池的电极反应式:负极:______;正极:______

(3)写出以石墨为电极,H2、O2、NaOH溶液构成的燃料电池的电极反应式:负极:______;正极:______.

答案:

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参考答案:C

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题型:阅读理解

Hi! I’m a Chinese girl. My name is Liu Wei. My English name is Sally. I’m twelve. I’m in Class 8, Grade 1. My English teacher is Mr. Lee. He is from New York. He is a good teacher. I don’t know how old he is. My good friend is Jane. She is from Canada. She is in Class 8, Grade 1, too. She is eleven. Who’s Linda? She is Jane’s sister. Her name is Linda. She is six.

小题1:Sally is a __________.

A.China

B.Chinese

C.Japan

D.Canada小题2:Mr. Lee is an ___________.

A.Chinese teacher

B.English student

C.Linda’s teacher

D.English teacher小题3:What grade are Liu Wei and Jane in?

A.They are in Class 8, Grade 1.

B.They are in the dame class.

C.I don’t know.

D.They are not in the same class.小题4: How old is Jane?

A.12.

B.11.

C.6.

D.8.小题5:Linda is ____________.

A.Chinese

B.a boy

C.from Canada

D.11

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