已知一个正数的平方根是a-3与2a-9，求这个正数的值。

假设证券组合P由两个证券组合Ⅰ和Ⅱ构成，组合Ⅰ的期望收益水平和总风险水平都比Ⅱ的高，并且证券组合Ⅰ和Ⅱ在P中的投资比重分别为0.48和0.52，那么组合P的（）。

A.总风险水平高于Ⅰ的总风险水平

B.总风险水平高于Ⅱ的总风险水平

C.期望收益水平高于Ⅰ的期望收益水平

D.期望收益水平高于Ⅱ的期望收益水平

以下是关于结构化信息系统分析与设计方面的描述。 Ⅰ．该方法适合于结构化程度较高的事务处理系统(TPS)的开发 Ⅱ．该方法适合于决策支持系统(DSS)的开发 Ⅲ．该方法适合于用户需求可以事先冻结的信息系统的开发 Ⅳ．该方法适合于业务流程比较稳定、规模适中的信息系统开发 Ⅴ．该方法适合于规模庞大的信息系统开发 以上描述中，正确的有( )。

A．Ⅰ、Ⅲ、Ⅴ

B．Ⅱ、Ⅲ、Ⅳ

C．Ⅰ、Ⅲ、Ⅳ

D．Ⅱ、Ⅲ、Ⅴ

Christmas, Easter and birthday parties can be difficult times for grandmothers and parents as they rush around trying to arrange the perfect celebration or making everyone as happy as possible! What’s better than a birthday party that makes your grandchild smile throughout or a celebration that impresses relatives and close friends?

That is why Granny Look has supplied in this section, one of the most comprehensive guides to making these special occasions that happen perhaps once a year a real success.

From a selection of Advent calendars to party planning or Christmas-stocking fillers we have all the possibilities covered so that your children and grandchildren will really have a memorable time with attractive gifts and original ideas.

Bring that festive spirit to all those traditional days, and ensure you are always ready for any possibility. Granny Look’s extensive links are bound to make every special occasion an entirely different experience from the year before and allow everyone to feel entertained and content.

CHRISTMAS-STOCKING FILLERS

Look no further! Granny Look helps the family to prepare in time for FATHER CHRISTMAS. Give SANTACLAUS some ideas. He can fill all the children’s Christmas-stockings with goodies! Unique Christmas gifts for children –– stocking fillers.

A Granny Look favorite!

ADVENT CALENDARS

All children love the build-up to CHRISTMAS! What is better than choosing one of Granny Look’s selection of Advent Calendars! Here you will find a list of websites to buy traditional or fun Advent calendars for children at Christmas time.

A Granny Look favorite!

BIRTHDAYS

LOOKING for a SPECIAL BIRTHDAY GIFT? Explore Granny Look’s selection of PRESENTS, PARTYPLANNING, PARTY TOYS and PARTY GAMES for your Children and Grandchildren’s BIRTHDAYS.

Plan and organize the KIDDIE’S PARTIES ahead of time!!

Don’t forget the PERSONALISED INVITATIONS!

CHRISTMAS

LOOK and BOOK now!! Granny Look’s selection of CHRISTMAS GIFTS for children.

Some guides to “What’s on in your area”… for the kids, PANTOS, SHOWS, THEATRES… at Christmas time!

UNIQUE Christmas gifts for Children. Spend QUALITY TIME with your Children’s Children this FESTIVE SEASON (圣诞节期间)!

小题1:If you want to send some invitations to your daughter’s classmates, where will you search for the information?

A．At Christmas.

B．At Birthdays.

C．At Advent Calendars.

D．At Christmas–stocking fillers.小题2:According to the passage, we can infer _______.

A．you can only get special ideas for Christmas, Easter and birthday parties

B．in Granny Look you can buy many traditional or fun Advent calendars for children at

Christmas time

C．there is no personalized invitation in Granny Look for you to select

D．Granny Look provides a wide range of links for people to prepare for special occasions小题3:From the text, we know that “Granny Look” is ______.

A．a website that helps you to prepare for special occasions

B．a company that sells all sorts of products on the Internet

C．a person who guides you to make your yearly celebration a real success

D．a magazine that helps the family to prepare for special occasions

牵牛花是在黎明四点左右开放，野蔷薇是在黎明五点左右开放，龙葵花是在清晨六点左右开放，芍药花是在清晨七点左右开放，鹅掌花是在中午开放，万寿菊是在下午三点左右开放。由此可见（）。

A．各种花都不在同一时间开放

B．各种花都有自己固定的开放时间

C．不是所有的花都在黎明开放

D．有的花是在下午开放

浙江浙海服装进出口公司(3313910194)在对口合同项下进口蓝湿牛皮(法定计量单位：千克)，由浙江嘉宁皮革有限公司(3313920237)加工成牛皮沙发革。承运船舶在帕腊纳瓜港装货启运，泊停釜山港转“HANSA STAVANGER”号轮(航次号HV300W，提单号HS03 D8765)后于2008年7月30日抵上海吴淞口岸申报进境。经营单位委托上海某货运代理公司持C29088100693号手册和310200108036124号入境货物通关单于次日向海关办理货物进口报关手续。

海运费、港杂费合计1500美元，保险费为140美元。

请根据以上资料，选择以下栏目正确选项：

“运输工具名称”栏（）。

A．NORTHERN ENTERPRISE

B．NORTHERN ENTERPRISE/302N

C．HANSA STAVANGER

D．HANSA STAVANGER/HV300W