下列哪项是细胞工程技术的产物（　　） 权所有

地沟油中含有一种强烈致癌物黄曲霉素B₂（C₁₇H₁₄O₆），长期食用会引起消化道癌变，请回答：
（1）黄曲霉素B₂的相对分子质量为____；
（2）黄曲霉素B₂中碳、氢、氧三种元素的原子个数比为____；
（3）15.7g黄曲霉素B₂中含有____g氧元素．

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      【甲】鱼，我所欲也；熊掌，亦我所欲也。二者不可得兼，舍鱼而取熊掌者也。生，亦我所欲也；义，亦我所欲也。二者不可得兼，舍生而取义者也。生亦我所欲，所欲有甚于生者，故不为苟得也；死亦我所恶，所恶有甚于死者，故患有所不避也。如使人之所欲莫甚于生，则凡可以得生者何不用也?使人之所恶莫甚于死者，则凡可以辟患者何不为也?由是则生而有不用也．由是则可以避患而有不为也。是故所欲有甚于生者,所恶有甚于死者 ．非独贤者有是心也，人皆有之，贤者能勿丧耳。
     【乙】天祥至潮阳，见弘范①，左右命之拜，不拜。弘范遂以客礼见之．与俱入涯山，使为书招张世杰。天祥曰：“吾不能扦②父母，乃教人叛父母，可乎?”索之固，乃书所过零丁洋诗与之。其末有云：“人生自古谁无死?留取丹心照汗青。”弘范笑而置之。涯山破，军中置酒大会。弘范曰：“国亡，丞相忠孝尽矣，能改心以事宋者事皇上，将不失为宰相也。”天祥泫然③出涕，曰：“国亡不能救，为人臣者死有余罪，况敢逃其死而二其心乎!”

      注：①弘范：元军元帅。②扦(hàn)：保卫。③泫(xuàn)然：水滴下的样子。

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                                                                                           Summer Holiday Fun 2015!

    The summer holidays are upon us again. Here is our guide to summer holiday fun in Peterborough!

    Peterborough Museum

    The Age of the Dinosaurs is the museum's main attraction this summer. Get up close to prehistoric creatures via some great hands-on exhibits！Watch out for monsters lurking around every ember！The museum is open from 10:00 am to 5:00 pm Monday to Saturday，and from 12:00 pm to 4:00 pm on Sundays in August.

    Call 01733 864663 for details.

    School holiday fun：Young people aged 13—19 will be able to produce their own music，compete in sports activities，or try their hand at cooking at Saxon Youth Club，Saxon Community Centre，Norman Road，Peterborough every Monday and Wednesday from 3:00 pm. PLUS an aero ball tournament will take place on Thursday,12th August between 3:30 pm and 6:30 pm.

    Call 01353 720274 for details.

    Houghton Mill

    Through the Looking Glass—a new production of the family favorite on Monday 30th，August. Bring rugs or chairs to sit on and a picnic if you wish to eat during the play. Gates open 5:30 pm，performance 6:30 pm—8:30 pm. Tea room will be open until the end of the interval. Adult ￡10. Child ￡7. Family ￡20.

    Booking advisable on 0845 4505157.

    Farmland Museum and Denny Abbey

    Farmland Games：From Wellie Wanging to Pretend Ploughing matches，come and join the Farmland Team. Collect your sporting stickers and create a colorful rosette that is fit for a winner！No need to book，just turn up between 12:00 pm and 4:00 pm on Thursday,19th August. Suitable for children aged four and above，each child should be accompanied by an adult and all activities are included in the normal admission price. Tickets Cost：￡ 7 per child.

    For further information，call 01223 810080.