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问题 选择题

某商品原价300元，连续两次降价a%后售价为248元，下面所列方程正确的是（　　）

A．300（1+a%）2=248

B．300（1-a2%）=248

C．300（1-2a%）=248

D．300（1-a%）2=248

答案

当商品第一次降价a%时，其售价为300-300a%=300（1-a%）；

当商品第二次降价a%后，其售价为300（1-a%）-300（1-a%）a%=300（1-a%）2．

∴300（1-a%）2=248．

故选D．

听力题

动词填空 用括号内所给动词的适当形式填空 (本大题共8分，每小题1分)

小题1:The fish on the plate smells so nice. Who _____________ (cook) it?                   

小题2:He said the next time he came here, he _____________ (stay) for a longer period of time.  

小题3:_____________ (not talk) to the boy who is learning German all by himself now, will you? 

小题4:When the teacher came in, I _____________ (complain) about too much homework.      

小题5:The chicken soup _____________ (taste) so salty that I had just a bit of it.              

小题6:The boys played computer games happily, _____________ (forget) all about their homework.

小题7:The fashion show _____________ (hold) unless it rains next Saturday.                  

小题8:She told us that the prices of fixed gear bicycles _____________ (rise) a lot recently.       
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单项选择题

政府经济的依据是（）

A、道德劝说

B、社会公共权力

C、财产所有权

D、法律制度
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