问题 解答题

判断下列语句是否是命题,若是,判断其真假,并说明理由.

(1)一个等比数列的公比大于1时,该数列为递增数列;

(2)求证:若x∈R,方程x2-x+2=0无实根;

(3)平行于同一条直线的两条直线必平行吗?

(4)当x=4时,2x+1<0.

答案

(1)是命题,因为当等比数列的首项a1<0,公比q>1时,该数列为递减数列,因此是一个假命题.

(2)不是命题,它是祈使句.

(3)不是命题,它是一个疑问句,没有作出判断.

(4)是命题,能判断真假,它是一个假命题.

阅读理解与欣赏

 江畔独步寻花    

   黄四娘家花满蹊,千朵万朵压枝低。    

留连戏蝶时时舞,自在娇莺恰恰啼。

1.这首诗是____朝著名诗人____所写。此诗人被后人誉为____   

2.反复吟读,仿佛自己也正随诗人漫步江畔。请你展开合理的想象,以第一人称(我的口吻),把此诗改写成一篇精美的小散文。

                                                                                                                                                  

                                                                                                                                                   

                                                                                                                                                   

                                                                                                                                                   

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