已知P为第一象限内一点，OP与x轴正半轴的夹角为a，且tana=34，OP=5，

阅读理解。

      Does it feel like you and your parents just can't see eye to eye? Are you always fighting with them

about your life? Follow these steps to find some peace.     

     Make a list of the things that you and your parents fight about the most.    

     Find what it is that makes you so unhappy or angry.    

     Decide on a fair compromise (公平的妥协案) a resolution that you can live with and that you think

your parents will accept.Set up a time to talk to your parents. Do not just bring it up over dinner but

make an actual appointment and tell them that you have an important plan to make.Bring your notes with

you to the meeting so you can stay on track if feelings get high.    

     Before talking to jour parents, take a few deep breaths. Make a promise (许诺) to yourself that you

will not raise your voice or get angry even if your parents turn up the volume.      

     When you have presented(提出) your case, take another deep breath and let your parents talk.

Really listen to what your parents say. Even if you do not like what they are saying, keep your ears and

mind open.

     If the outcome (结果) makes you disappointed, do not shout at your parents. Go to your room

and write down your feelings or go outside and ride vour bike.

根据短文内容，回答问题。

1.Is it necessary for kids to make an actual appointment to talk with their parents ?

2. Why does the writer advise kids to bring their notes with them ?

3. What can kids do if the outcome makes them disappointed？

4. What does the writer mainly talk about?

中国药典收载的亚硝酸钠滴定法中指示终点的方法为

A．电位法

B．永停法

C．外指示剂法

D．不可逆指示剂法

E．电导法

（）是社会保障制度产生与发展的基础性影响因素

A、经济因素

B、政治因素

C、道德因素

D、社会因素

起重机边起钩、边旋转，使柱身绕柱脚旋转而逐渐吊起的方法称为( )。

A．旋转法

B．一点起吊法

C．滑行法

D．直吊法

口岸行指定重空物品管理员双人取出寄库款箱，会同交行“金交所指定存货人员”核对（）相关内容，办理金交所指定交割金库入库手续。

A.《寄售黄金录入交易所仓储系统通知书》

B.《装箱单》

C.《黄金质量检验证书》

D.《境外汇款申请书》