问题 单项选择题 A1型题

维生素D缺乏性佝偻病时由骨样组织增生所致的骨骼改变为()。

A.方颅

B.肋膈沟(赫氏沟)

C.鸡胸或漏斗胸

D.“O”形腿或“X”形腿

E.脊椎后突或侧弯

答案

参考答案:A

解析:维生素D缺乏性佝偻病的骨骼改变往往在生长最快的部位最明显,不同年龄有不同表现。方颅:是由于骨样组织增生,致额骨及顶骨双侧对称性隆起形成。肋膈沟(赫氏沟):是由于膈肌附着处肋骨受牵拉而内陷形成的一道横沟。鸡胸或漏斗胸:肋骨骺部内陷,以至胸骨向前突出形成。“O”形腿或“X”形腿:骨质软化和肌肉松弛,下肢负重而导致。脊椎后突或侧弯:因韧带松弛可致脊柱后凸畸形。故选A。

完形填空

第二节:语法填空:(共10小题;每小题1.5分,满分15分)

仔细阅读下面的短文,短文中有10个空格。请按照每小题括号内的具体要求完成语法填空和词形变化。

Among all the fast growing science and technology, the research of human genes, __31_ biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic __32__ (discuss) by people.

The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two __33__ (kill). And to date, doctors have not found __34_ effective way to cure them. But if the gene technology __35__ (apply) , not only these two diseases can be cured completely, __36__ (bring)  happiness and more living days to the patients, but also the great amount of money people spent on curing their diseases can be saved, so __37__ benefits the economy as well. In addition, human life span(寿命) can be prolonged.

Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial(皇室) family being a good example, have hereditary diseases. This means their children will for sure have the family disease, __38__ is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases, __39__ gene technology can solve this problem __40__ (perfect). The scientist just needs to find the wrong gene and correct it, and a healthy child will be born.

单项选择题