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问题 选择题

下列反应属于分解反应的是[ ]

A.3Mg+N2Mg3N2

B.2Fe(OH)3Fe2O3+3H2O

C.2NaOH+CuSO4==Na2SO4+Cu(OH)2↓

D.AgNO3+NaCl==AgCl↓+NaNO3

答案

答案：B

阅读理解

I am a middle school student. My name is WeiFang. I’m thirteen now. I study at No.52 Middle School. I am in Class 3, Grade 1. There are twenty boys and twenty-three girls in my class. We have four lessons in the morning and two in the afternoon. We like English very much.

小题1:WeiFang is _______.

A．eleven

B．twelve

C．thirteen

D．fourteen小题2:There are ______ students in her class.

A．23

B．20

C．40

D．43小题3:WeiFang is in ________.

A．Class Three, Grade One

B．Class One, Grade Three

C．Grade One, Class Three

D．Grade Three, Class One小题4:Do they have six lessons in a day?

A．No, they aren’t

B．Yes, they do

C．No, they don’t

D．Yes, they are小题5:Which sentence is wrong（错误的）?

A．WeiFang is in No.52 Middle School.

B．WeiFang likes English very much.

C．WeiFang has six English lessons every day.

D．WeiFang is a middle school student.
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单项选择题

为了保证套管鞋处封固质量，油层套管采用双塞固井时，阻流环距套管鞋长度不少于（）m。

A.5

B.10

C.15

D.20
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