题目内容
38、(You may read the questions first)
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MD 9572 £69.99
Plan your journey they easy way This portable Traveler will give you directions from A to B
anywhere in England, Scotland and Wales. Just enter the start and the end of your journey and the Traveler will work out the quickest route. The Traveler can also estimate the journey time. average speed and fuel consumption. Need to change your journey at any stage?The Traveler will give you a new set of directions. Other features include auto shut-off.And a built-in light for night-time use.
Powered by 4AA batteries (not supplied).
MD 7437 Traveler £69.99
How much do you know?
Everyone, young and old, enjoys and challenge of quizzers. Our electronic Quizmastercontains 5,400 questions and answers in 6 classifications-general knowledge, sport, science, geography, art and history. Each of these is further divided into 3 skill levels(easy, medium and difficult)so younger children can fairly compete against teenagers and adults. PLUS!
Every Quizmaster includes:
·8 Games of Hangman
·Portune Teller Games
·10-digit calculator
·long life cell batteries included
MD 9569 Quizmaster was £19.99 now £14.99
1 In advertisement 2, the Traveler enables us to learn__________.
A. the road conditions from London to Oxfords
B. all the garages along the chosen route
C. the time and speed of the journey in Britain
D. the directions from London to Paris.
2 In advertisement 3, the Quizmaster_________.
A. contains nothing but 5400 questions B. can only answer challenging questions
C. can be purchased in many shops D. can be used by people of all
3 All these advertisements are aimed at those_________.
A. who like to order goods at home B. who are going to travel abroad
C. who do market researches D. who are interested in intelligence tests
试题答案
38、1.C 2.D 3.A
You may _____ find it hard to get along well with them.
A. certainly B. likely C. possibly D. probably
查看习题详情和答案>>请阅读下列材料,并回答问题:
材料:现有一多肽,化学式为C55H70O19N10,已知将它彻底水解后得到下列4种氨基酸:
(1)上述材料中 4种氨基酸的结构通式 ,谷氨酸的R基是 。
(2)材料中的肽链如果发生水解,断裂的化学键是__________,断裂后共形成__________个氨基酸。
(3)该肽链中谷氨酸共有_________个。
红眼(R)雌果蝇和白眼(r)雄果蝇交配,F1代全是红眼,自交所得的F2代中有红眼雌果蝇121头,红眼雄果蝇60头,白眼雌果蝇0头,白眼雄果蝇59头。则F2代卵中具有R和r及精子中具有R和r的比例是
- A.卵细胞:R∶r=1∶1精子:R∶r=3∶1
- B.卵细胞:R∶r=3∶1精子:R∶r=3∶1
- C.卵细胞:R∶r=1∶1精子:R∶r=1∶1
- D.卵细胞:R∶r=3∶1精子:R∶r=1∶1
某39肽中共有丙氨酸(R基为-CH3)4个,现去掉其中的丙氨酸得到4条长短不等的多肽(如图),下列有关该过程的叙述中错误的是 ( )
A.肽键数目减少8个 | B.C原子减少12个 |
C.氨基和羧基分别增加3个 | D.O原子数目减少1个 |
已知水稻高秆(T)对矮秆(t)为显性,抗病(R)对感病(r)为显性,这两对基因在非同源染色体上。现将一株表现型为高秆、抗病的植株的花粉授给另一株表现型相同的植株,所得后代表现型是高秆∶矮秆=3∶1,抗病∶感病=3∶1。根据以上实验结果,判断下列叙述正确的是( )
A.以上两株表现型相同的亲本,基因型也相同 |
B.以上后代群体的表现型有9种 |
C.以上两株亲本一株为纯合子,一株为杂合子 |
D.以上后代群体的基因型有16种 |