问题 单项选择题

我国科研人员经过对动物和临床的多次试验,发现山茱萸具有抗移植免疫排斥反应和治疗自身免疫疾病的作用,是新的高效低毒免疫抑制剂。某医学杂志首次发表了关于这一成果的论文。多少有些遗憾的是,从杂志收到该论文到它的发表,间隔了6周。如果这一论文能尽早发表的话,这6周内许多这类患者可以避免患病。
以下哪项最能削弱上述论证

A.上述医学杂志在发表此论文前,未送有关专家审查。
B.只有口服山茱萸超过两个月,药物才具有免疫抑制作用。
C.山茱萸具有抗移植免疫排斥反应和治疗自身免疫性疾病的作用仍有待进一步证实。
D.上述杂志不是国内最权威的医学杂志。
E.口服山茱萸可能会引起消化系统不适。

答案

参考答案:B

解析:题干冈为“论文发表晚了6周”而得出结论“如果这一论文能尽早发表的话,这6周内许多这类患并可以避免患病”,实际上假设了“山茱萸的作用是即时的,即吃了就有用处”,B选项以“两个月的滞后期”使这一假设被否定,因此削弱论证。

填空题
阅读理解

阅读理解。

     As a kid, I can remember going to the supermarket and grabbing eggs off the shelf. I would run them

home to my mother because they were usually going into a delicious cake. Times  have  changed.  

Cagefree?  Organic?  Brown? White? Omega3s? Help! Here are some tips to help you figure out which

eggs you should choose:

     ●Brown or white? In fact, color is simply a sign of the breed of hen. Find the freshest egg with the

most flavor and let color be a secondary concern.

     ●Extra Omega3s? Omega3 eggs come from a hen whose diet has added flaxseed(亚麻籽) ,which

produces an egg containing an average of 225 mg of Omega3 fatty acids and Vitamin E. The countless

health benefits for humans make these eggs an attractive purchase. My opinion? Eat a piece of fresh fish

and get a pure dose of Omega3s. Let eggs be eggs.

     ●Does your egg need exercise? Freerange eggs are from hens raised without the confines of a cage,

though they may or may not have spent much time outdoors. Organic eggs are from hens whose feed

must meet organic standards. These hens must be raised humanely, and they must be given time to stay

outdoors. Hey, happier hens do lay tastier eggs.

     ●Does local make a difference? Nothing is better than local eggs. They may have a feather or two

stuck to them or be a little imperfect shape and they may or may not be certified (证明) organic;

however, they have one quality I prize: I know exactly where my food came from and how it came to be!

In some cases I can even ask the farmer when the eggs were laid and what the hens were fed.

1. What does the author think of Omega3 eggs?

A. They are a good choice for people to purchase.

B. They contain fewer Omega3s than fresh fish.

C. They have the highest content of pure Omega3s.

D. They are not the best source of Omega3s.

2.The underlined part "Freerange" probably means"______".

A. wild      

B. organic

C. special    

D. Omega3free

3. According to the passage, which of the following has nothing to do with an egg's quality?

A. The egg's color.    

B. The hen's exercise.

C. The hen's living conditions.  

D. The hen's food.

4. This passage is most probably taken from a book named________.

A. Shopping Skills 

B. Eggs and Cooking

C. Raising Hens  

D. Healthy Diet