收益法的本质是以房地产的未来收益为导向来求取房地产的价值，通常把收益法求得的价值简称

若函数y=f（x+1）是偶函数，则下列说法：

①y=f（x）图象关于直线x=1对称；②y=f（x+1）图象关于y轴对称；

③必有f（1+x）=f（-1-x）成立；④必有f（1+x）=f（1-x）成立；

其中正确的说法有（    ）。（把你认为正确的序号都填上）

使用要素饮食应注意（）

A.无须严格执行无菌操作

B.配制好的溶液存放于4℃以下的冰箱内保存

C.长期使用者应补充维生素和矿物质

D.应用期间应定期检查血糖、尿糖、电解质等指标

E.已配制的要素饮食应24h用完

工业生产部门中只包括制造业的国家是( )

A．美国

B．新加坡

C．英国

D．瑞士

Has been a dream for 30 years but now the world’s first flying car is set to hit the roads this year.

Ever since the “Back to the Future” movies lit up our screens in the 1980s, designers have dreamt of cars that could take to the sky at the push of a button(按钮). And now pilots can order their own “roadable” plane for just￡127, 000.

The plane, which has fold-out wings that span 17. 5 feet, can be up to 115 mph. Back on the land, it can also travel at “highway speeds” in car mode(模式).

Fuelling(加燃料)the 19 feet long plane couldn’t be simpler—you just drive it into a petrol station and fill it up.

A spokeswoman said, “You can keep your ‘light-sport airplane’ in your garage. But because it needs a short runway to take to the air, you will have to drive to your local airport, fly up to 460 miles, land and drive directly to your destination(目的地). You will always be ready to drive or fly. ”

The spokeswoman added, “Never let bad weather change your trip. You can simply divert(使转向)and continue on the ground until the weather clears. ”

There’s no risk to you—this is only the chance for you to be the first at your home field to unfold(展开)your wings and fly into the future.

小题1:According to the text, the “roadable” plane　　　.

A．can fly in the sky at “highway speeds” in car mode

B．is a kind of car with fold-out wings

C．is a little difficult to fuel　

D．can only travel on the highway小题2:We can infer that in the “Back to the Future” movies　　　.

A．there are some skillful pilots

B．pilots have no cars to drive

C．pilots can’t afford a “roadable” plane

D．cars can fly in the sky小题3:What does the underlined word “it” in the 5th paragraph refer to?

A．Light-sport airplane.

B．Your garage.

C．The local airport.

D．A petrol station.小题4:The last sentence of the text aims to　　　.

A．call for people to buy the “roadable” plane

B．show people the use of the “roadable” plane

C．tell people only the “roadable” plane can fly in the future

D．ask people to unfold their wings and fly into the future小题5:If you meet with a thunderstorm in your “roadable” plane in the skies, you can　　　.

A．land in a nearby airport until it clears

B．turn back home until it clears

C．land and drive on the ground

D．fly high up to 460 miles

案情：2005年6月6日，甲、乙、丙三兄弟的父亲死亡，留了一份遗嘱，将其生前收藏的—。幅名画留给了这三兄弟。并指定由老大甲负责保管。同年9月，甲遇丁，丁愿购此画。甲即将此画作价3万元卖给丁。事后，甲告知乙、丙。乙、丙要求分得卖画款项，甲分别给乙、丙各1万元。
丁购买该画后，于同年12月又将此画以4万元卖给戊。两人约定：合同签订后，即将画交付戊，但因丁将在半年内举办个人收藏品展，故自该画交付之日起半年后画的所有权才将转移于戊。依此约定，丁将画交付戊，戊先期支付价款3万元。2006年3月，戊因生意失败向其朋友己借款5万元，戊友己亦爱此画，便要求戊质押该画作为借款的担保，戊与己签订了质押合同，并将画交给了己。后己嫌该画的装裱不够精美，遂将该画送庚装裱店装裱。因己未按期付庚装裱店费用，该画被庚装裱店留置。庚装裱店通知己应在30日内向其支费用，但己仍未能按期支付。庚装裱店遂将画折价受偿，扣除费用，将差额补偿给己。己不同意庚装裱店的这一做法。
根据上述案例，请回答：

本案主要涉及哪些民事法律关系