问题 阅读理解

Bayfield Shopping Coupons (赠券)
1. Six Hours Free Parking
If you spend $ 100 or more in our stores you will receive six hours of free parking. When you have spent $100 or more, just take this coupon and your receipt to the customer service desk on level 4. They will stamp your parking ticket to allow 6 hours of free parking.
Offer here until November 14.
2. Win a $1000 CD Collection
Win your choice of $1000 worth of CDs from JB Music Store. Just buy any two CDs and your name will go into the competition. Select your own prize from our wide variety of rock, pop, jazz and classical music.
Competition ends November 14. Prize drawn on November 21.
Check store for more information
3. Buy One, Get One Free
Buy one shirt or tie at Daniel’s Menswear, and get another shirt or tie of the same value free.
Choose from any of our dress shirts and we will give you another one at no cost.
Hurry! Offer ends November 14.
Offer limited to one per customer.
4. 10% Off
Present this coupon at The Book Store to get a 10% discount on any books you buy. We have lots of books to choose from, including children’s books, novels, travel guides, and science works. You are sure to find something that you will enjoy. Shop now for Christmas, we have a large quantity of toys as gifts for you and avoid the rush!
Offer here until November 14
5. Half-price Movie Tickets
Buy any full-price movie ticket on Tuesdays or Wednesdays, and you can buy a second tickets for a friend for only half price. The latest movies are here, being shown in one of our five theaters at Bayfield Shopping Center.
Offer here through December 1, Limit on per customer.
6. Free Soft Drink
Buy any meal for at least $6 at Mike’s Café, and receive a free soft drink. We serve the best food in the Shopping Center. Come in and try our delicious meals and our excellent service. You won’t be disappointed!
Free soft drink offer ends November 14.
1. What are these ads for?
A. Food you can order for delivery.     B. Places to go on vacation.
C. Special offers at a shopping center.      D. Things on sale in a big store.
2. Which of the following is true according to the ads?
A. Spending $50 means 3 hours of free parking.
B. One person can buy 5 tickets for the price of three.
C. After buying two CDs, you can get another two CDs for free.
D. At Mike’s Café, people can get a free drink after spending $6.
3. Which of the following is NOT mentioned at this mall?
A. Clothes store.       B. Music store.          C. Restaurant.    D. Toy store.
4. We can know from this passage ________.
A. there is more than on theater in the center.
B. if you buy a book there, you may pay less than half the price.
C. you may get a free on if you buy a shirt, or a tie, or a pair of shoes.
D. you won’t get a free soft drink unless you spend more than 10 dollars on the meal.
答案

小题1:C

小题2:C

小题3:D

小题4:A

问答题
单项选择题

人体血管内的血液昼夜奔流不息。然而一旦血管出现小破口,流出的血液便会在短时间内凝固(coagulation),以阻止更多的血液流出。这种神奇的保护机制涉及一大串连锁反应,已知参与其中的物质多达数十种。如同多米诺骨牌一样,参与凝血反应的因子________,层层递进,经过一系列级联和放大效应最终使得纤维蛋白原转化为纤维蛋白,正是由于后者的出现,液态的血液才慢慢转变为胶冻状并不再流动。参与凝血反应的因子多数为蛋白质,它们在肝脏合成、降解和失活,因而肝脏功能的好坏将直接影响人体的凝血功能,肝功能差的患者常常会出现皮下淤血。除此之外,肝脏合成某些凝血因子还少不了一种营养素的帮助——这就是维生素K。维生素K的促凝血作用是在1934年被一位名叫达姆(Henrik Carl Peter Dam)的丹麦科学家发现的。1929年,达姆在一项针对小鸡的实验中注意到了某种异常:当食物中长期缺乏脂类时,小鸡开始有自发出血的现象。达姆采集了 鸡的血液,发现鸡血的凝固时间大大延长了。这说明脂类食物中可能存在未知的促进血液凝固的物质。5年之后,达姆确认麻籽中富含这种止血物质,并将这种物质 命名为“凝血维生素”或维生素K。维生素K参与凝血因子Ⅱ,Ⅶ,Ⅸ,Ⅹ的合成。作为谷氨酸γ羧化反应的辅因子,维生素K能够确保肝脏产生足 够的正常凝血因子,继而保证凝血反应正常进行。天然维生素K(K1和K2)不溶于水,因而需要从富含脂类的食物(如动物肝脏)中摄取。但是正常情况下人体 并不会缺乏维生素K,因为还有部分维生素K(K2)可经肠道细菌合成。维生素K的吸收依赖胆汁,因此当胆汁流动的管道(胆管)被结石或肿瘤阻塞时,患者常 常会发生维生素K缺乏,继而产生凝血障碍。新生儿肠道菌群尚未完全建立,维生素K的合成能力不足,容易缺乏维生素K而产生出血症状。针对上述人群的出血, 补充维生素K会取得很好的止血效果。

下列作为这篇短文的标题最恰当的是( )。

A.维生素K的凝血作用

B.维生素K的发现

C.人体自身的凝血功能

D.一种参与凝血的因子