函数f（x）=x2-x-2，x∈[-5，5]，那么任取一点x0，使f（x0）＞0

Dear Peter,

Thanks very much on inviting me to your birthday party on Sunday. I’d like very much come but I will had an examination on Monday morning. It is a very important exam but I can’t afford to fail it. I’ll spend all the whole weekend reading and prepare for it. So I’m really sorry that I won’t be able to come in this time. Hope you can understand. I’ll take this chance to wish you wonderful time on your birthday. Happy birthday, Peter, and many happy return of the day!

Yours,

Li Ming

在电力网中，当电感元件与电容元件发生串联且感抗与容抗相等时，就会发生（）谐振现象。

A、电流；

B、电压；

C、铁磁；

D、磁场；

患儿，男，7个月。因"间断腹泻2个月，厌食1个月"来院门诊。查体：患儿神清，精神反应差，皮肤黏膜苍白。心、肺(一)，腹平软，肝肋下2cm，脾肋下1cm。末梢血常规：血红蛋白70g/L，红细胞3.5×109/L，白细胞及血小板正常。根据病情，应首先考虑

A．营养性巨幼红细胞贫血

B．营养性缺铁性贫血

C．再生障碍性贫血

D．珠蛋白生成障碍性贫血

E．生理性贫血

以下哪种药物不可以作为缓解腰背痛症状的首选药物？（）

A.对乙酰氨基酚

B.肌松类药物

C.阿司匹林

D.布洛芬和其它的NSAIDs

E.利多卡因

下列关于对联的断句表述正确的是（）。

A.掌握对联短句多、长句少的特点

B.注意对联中的领词

C.上下联互相参照断句

D.根据平仄规律断句