题干

下列计算错误的是(   )

A:(﹣2x)3=﹣2x3

B:﹣a2•a=﹣a3

C:(﹣x)9+(﹣x)9=﹣2x9

D:(﹣2a32=4a6

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答案(点此获取答案解析)

A

同类题3

阅读材料,完成下列要求。

    中国梦是两岸同胞共同的梦,需要两岸领导人和两岸同胞一起来圆。

    2015年11月7日下午3时,新加坡香格里拉大酒店会见大厅,两岸领导人***、马英九的手紧紧握在一起。66年来,两岸交往历经了曲折、见证了变化,从对峙到和解,从隔离到三通,从犹疑到互信,每一次两岸关系的前进与突破都是铺就“习马会”的基石。

    世界潮流,浩浩荡荡,顺之者昌,逆之者亡,“习马会”乃“顺势而为”。两岸领导人的会面既不能在条件不成熟时强推,以致欲速则不达;也不能在条件已成熟时仍瞻前顾后,以致错失良机。由于时空背景变换,两岸关系走到今天,进入关键时期,方向道路如何选择?双方认为,应该继续坚持“九二共识”这一政治前提,巩固共同政治基础,加强沟通对话,扩大两岸交流合作,实现互利共赢,造福两岸民众。***讲话指出,两岸人民是“血浓于水的一家人”“打断骨头连着筋的同胞兄弟”“两岸同胞同属中华民族,都是炎黄子孙,应该携手合作,致力于振兴中华,致力于民族复兴”。

    历史不能选择,但现在可以把握,未来可以开创。两岸同胞命运与共,彼此没有解不开的心结。两岸双方应该从两岸关系发展历程中得到启迪,以对民族负责,对历史负责的担当做出经得起历史检验的选择,不畏浮云适望眼。

同类题4

完形填空

    "There once was a beggar who loved to hear himself sing.He lived1a dustbin next to a supermarket.He had the most amazing voice.No one would listen to him,2.Cats and dogs would come to sing along.All animals would come to hear this sound.No3though.His4audience were the animals.Even without people to sing to.the man was filled with5for he loved his voice.

    Then one day,a little girl was on her way to the supermarket.The man was singing one of his favorite songs.The little girl6him and wondered what that noise was.She began7around every corner until she found him. The girl's eyes began to grow wide as she saw the man in his8clothes.She asked him to sing,with no9of danger in her voice.This shocked the man.He sang for the girl with joy in his eyes.Although it was nice to be 10to sing,it was also nice to have an audience.He sang until they heard the girl's mother11for her.The girl quickly said12and ran off.

    The girl returned the next day and asked him to sing.13he sang for the little girl.After a few songs,she left14the call of her mother.She came the day after,with an older woman.This was the girl's15.She did not seem to mind being led behind a16dustbin.The girl asked the beggar to sing.The man sang his heart out for the17of them to hear.The mother's frown began to18and a smile began to appear.The days after were full of cheerful singing and the audience of two19,they would bring more people to listen.The beggar continued to sing until he could not sing anymore.20he loved his voice anymore.