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问题 选择题

NA为阿伏加德罗常数，下列说法正确的是（    ）

A．100 mL 1 mol·L-1的CH3COOH溶液中含有CH3COOH分子0.1 NA

B．等物质的量的N2和CO的质量均为28g

C．25℃，pH＝13的NaOH溶液中含有OH－的数目为0.1NA

D．100mL1mol/L的Na3PO4溶液中含有离子数多于0.4NA

答案

答案：D

题目分析：A、由于醋酸是弱酸，故100 mL 1 mol·L-1的CH3COOH溶液中含有CH3COOH分子小于0.1 NA； B、未标明物质的量故无法判断质量；C、25℃，pH＝13的NaOH溶液中含有OH－的浓度为0.1mol/L； D、100mL1mol/L的Na3PO4溶液中含有离子数多于0.4NA正确 。

完形填空

Hello, everyone! My name is Ken. I’m     1    years old. I was born (出生) in 1999.  My birthday is     2   . That’s National Day (国庆节). I like music very much and I     3    like sports.
My birthday is coming. My mother     4    buy a beautiful shirt     5    me. On Sunday, she     6    me to a big     7    store. There are     8    shirts and they are         9    blue, yellow and red. She selects(选了) a blue one. It looks cool.
My father gives me some CDs and a     10   . He knows what I like. He wishes(希望) me to play sports more. I am very     11   . And my sister, Monica, she is only two years old, so she can’t buy anything for me.    12    she sings a great song for me. It’s     13    fun. And I like her so much.
My parents want to have a     14    for me at home this year. My friends will come to it. We can play together. It’s very exciting     15    my friends in my house.
小题1:
A．eleven B．twelveC．fourteenD．sixteen
小题2:
A．June 1stB．July 1stC．August 1stD．October 1st
小题3:
A．tooB．alsoC．onlyD．don’t
小题4:
A．wantB．wantsC．need toD．wants to
小题5:
A．forB．atC．toD．on
小题6:
A．sellsB．takesC．buysD．brings
小题7:
A．foodB．clothesC．fruitD．book
小题8:
A．muchB．a littleC．lot ofD．many
小题9:
A．inB．onC．toD．at
小题10:
A．penB．notebookC．basketballD．hamburger
小题11:
A．happyB．boringC．interestingD．relaxing
小题12:
A．BecauseB．ButC．ThenD．Next
小题13:
A．onlyB．notC．reallyD．a little
小题14:
A．school dayB．birthday party
C．sports gameD．speech contest
小题15:
A．to play withB．to look for
C．to learn aboutD．to listen to
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选择题

下列观点错误的是[ ]

A．李明说：“我们在搞好学习的同时，还要胸怀天下，承担起关爱社会的责任。”    

B．刘倩说：“国家处在困难时刻，最能考验公民的责任意识。”     

C．高鹏说：“我们青少年肩负着铸造民族新辉煌的历史责任。”          

D．赵伟说：“参加公益活动、服务社会是大人们的事，与我们初中生无关。”
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