十五岁的中学生李某作出了一项发明创造，并就此获得了一项发明专利。某公司认为该项技术市场前景较好，遂与李某签订了专利权转让合同，以50万元的价格受让该顶专利。根据民法通则及其他相关规定，该转让合同的效力应当如何认定
A．合同自签订之日起有效
B．由于李某不具有完全民事行为能力，因此该合同自始无效
C．经李某的法定代理人追认后，该合同方为有效
D．在李某的法定代理人追认之后，该公司有权以李某不具有完全民事行为能力为由撤销该合同
参考答案：C
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| I live in a big city with a lot of homeless people.Luckily there're small ways of helping them and you needn't have a lot of__1__.One way to help is to buy their monthly magazine.__2__doing this one day,I got to__3__a young homeless man.He was often__4__the magazine at the train station. He was a poor farmer from another country.After a while,I discovered that his__5__was close to mine.It__6__that we were born in the same month. I met him last year__7__after his birthday,and after congratulating (祝贺) him,without__8__,I asked if he had had a good day.He__9__and said that he hadn't really celebrated.I felt so__10__. I just couldn't bear the thought of (不敢想) this nice,young ma  n being__11__on his 25th birthdaywith no presents,no cake,nothing!So I went home and looked in my yarn (纱线) basket.__12__for me,I had  enough yarn__13__.I set to work and knitted (编织) a__14__for the young man.The yarn had become a little dirty__15__I didn't knit very often.Then I washed the yarn so the scarf would be __16__when he got it. I met him on my own birthday as I was going shopping.I had__17__to meet him so I had__18__ the scarf and a piece of my own birthday__19__around with me.He was very happy with these gifts and so was I．The__20__in his eyes was the best present he could have given me! | |||
| ( )1．A.work ( )2．A.In ( )3．A.realize ( )4．A.selling ( )5．A.birthday ( )6．A.said ( )7．A.long ( )8．A.stopping ( )9．A.looked up ( )10．A.foolish ( )11．A.calm ( )12．A.Suddenly ( )13．A.used ( )14．A.scarf ( )15．A.when ( )16．A.different ( )17．A.liked ( )18．A.made ( )19．A.cake ( )20．A.light | B．energy B．On B．ignore B．reading B．house B．found B．shortly B．helping B．turned up B．excited B．happy B．Luckily B．done B．cap B．because B．dry B．hoped B．thrown B．present B．pain | C．money C．Besides C．know C．covering C．height C．guessed C．ever C．praising C．looked down C．clever C．alone C．Badly C．left C．sock C．so C．wet C．promised C．received C．song C．sight | D．experience D．By D．recognize D．buying D．hobby D．meant D．even D．thinking D．got down D．worried D．hungry D．However D．produced D．glove D．and D．clean D．agreed D．carried D．party D．tear |