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问题 选择题

在不考虑国际油价变动的影响，国家发改委决定对7—8月份每升汽油价格进行微小调整，这是因为（   ）

A．夏季气温高，汽油密度变大，故每升汽油价格需上调

B．夏季气温高，汽油密度变小，故每升汽油价格需下调

C．夏季气温高，汽油密度变大，故每升汽油价格需下调

D．夏季气温高，汽油密度变小，故每升汽油价格需上调

答案

答案：B

气温上升，汽油受热体积变大，在质量保持不变时，根据公式ρ=M/V

可知密度变小；根据公式m=ρV可知，相同体积的汽油质量减少，所以每升汽油价格下调．

故选B．

填空题

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空,并将答案填写在答题卷标号为1-10的相应位置上。

     This Saturday morning I was having a walk around, enjoying the quiet morning, beautiful weather and lovely life, with my dog Jett running   _1_  (enjoy) beside me.  

     At one home I passed, I noticed a newspaper that    2__ (lie) by the roadside instead of near the door. Thinking I would make someone else's life a little   _3__(easy), I picked up the paper and gently threw it towards their door.   _4__  instead of landing on the doorstep, the paper sailed    _5__   the wrong direction because of the strong wind and landed on the roof of a big truck in the driveway.  

     No one saw the funny scene but me and I burst out laughing. It was very quiet and they were probably still sleeping. It was too early to knock on the door and tell the homeowner  __6__ their newspaper was.   __7_  , instead I walked home, got dressed and went to the store to make it right.  

     I returned a little later with a new newspaper and a basket of strawberries freshly  _8__(pick) from my garden. I found the homeowner in the driveway with some of his friends. With a deep breath I came up to him and said, "I hope you have a great sense of humour." I explained what had happened to    _9__  newspaper.  

     Hearing this they all laughed loudly and I couldn't help but smile all day. I've heard it said. "Character is what you do  _10 _  nobody is looking." I should be a man of character!
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填空题

对于可能送电至停电设备的各方面或停电设备可能产生感应电压的都要装（），所装接地线与带电部分应符合（）的规定。
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