9. Mary _______ control of herself while she _______ about the traffic accident.
A. was losing; was asking B. lost; was being asked
C. has lost; was asked D. had lost; asked
8. Please don’t try to break your word _______everything has been arranged.
A. since then B. now that C. only if D. so long
7. I never go past that house _______ think of the happy life we had in the old days.
A. where B. and C. that D. but
6. If you want to see the chairman of the department, you’d better make an _______ with his secretary first.
A. admission B. agreement C. appointment D. assumption
5. In the poor parts of America's big cities there is a lot of crime, _____ .
A. and many more is serious B. much of it is serious
C. and much of it is serious D. more of it is serious
4. ---Where did you find your deskmate Tom?
--- It is in the library _______ he studied.
A. that B. where C. which D. if
3. _______ originally as the biggest defense work in ancient China, the Great Wall today has become one of the must–see places for visiting foreign leaders to the country in the past six decades. Obama is the fifth US president _______ the man-made wonder.
A. Having been built; visiting B. Being built; visited
C. To build; having visited D. Built; to visit
2. _______ A/H1N1 influenza cases accounted for 89.4% of all flu cases reported in _______ mainland of China last week, almost 3% points higher than the figure of the previous week.
A. The; the B. /; / C. An; the D. The; /
第一节:单项填空(共20小题;每小题0.5分,满分10分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
1. ---How is it that you are late for class again?
---_______.
A. By bus and then on foot B. Because I missed the bus
C. It’s quite all right D. It’s far from school
45、(18分)芦笋是常见的雌雄异株植物之一,为XY型性别决定,雌株的性染色体为XX,雄株的性染色体为XY,其染色体数目为2N=20。野生型芦笋叶窄,在野生种群中,一株雌芦笋的一条染色体上某基因发生了突变,由窄叶突变成为阔叶,用该植株与野生型雄株杂交,F1雌雄植株中均有窄叶,也有阔叶。(基因用字母B、b表示)
⑴ 在窄叶和阔叶这对相对性状中,显性性状是 。
⑵ 上述杂交实验的结果能否确定阔叶基因在X染色体上还是在常染色上? 。
用文字简要说明推断过程。
⑶ 假如控制窄叶和阔叶的基因位于X染色体上。由于雄株的产量高于雌株,某园艺场需要通过一次杂交育种培育出一批在幼苗时期就能识别出雄性的植株,请你设计一个简单实用的杂交方案。(提供的植株有阔叶雌雄株、窄叶雌雄株,要求用遗传图解表示杂交方案)
⑷ 现只给你提供芦笋雄株,请设计一套育种方法,从理论上保证得到的子代全是雄株,写出简要过程。(不直接采用组织培养法)
① ;
② ;
③ 。
2009学年浙江省第一次五校联考
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