问题 单项选择题

维生素D缺乏性佝偻病激期血生化的特点是()

A.血清钙正常,血清磷降低,碱性磷酸酶降低

B.血清钙降低,血清磷降低,碱性磷酸酶增高

C.血清钙降低,血清磷正常,碱性磷酸酶增高

D.血清钙降低,血清磷增高,碱性磷酸酶降低

E.血清钙正常,血清磷降低,碱性磷酸酶增高

答案

参考答案:B

解析:佝偻病活动早期多见于3个月发病,主要表现非特异性神经精神症状。此期常无骨骼病变,但有血生化改变:血钙正常或稍低,血磷降低,碱性磷酸酶增高或正常,血清25-(OH)D3可降低。激期血生化的特点则是血清钙降低,血清磷降低,碱性磷酸酶增高。

多项选择题
写作题

读写任务。

阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

     In junior high school, one of my classmates, Ethan, was addicted to TV. This boy simply knew everything

about such pop shows as Who's the Boss?

     Then one day Ethan's mother made brim an offer in order to draw him back to his school subjects. She

promised that she would give him $200 if he could go a full month without watching any TV. None of us

thought Ethan could do it, but he did quite well. His mom paid him $200. He went out and bought a TV, the

biggest he could find.

     In recent years, hundreds of schools have carried out experiments with paying kids with each for showing

up or getting good grades. All school kids admire this trend. But it upsets adults. Teachers say that we are

rewarding kids for doing what they should be doing of their own will. Psychologists warn that money can

actually make kids perform worse by making the act of learning cheap. The debate has become a typical battle

over why our kids are not learning at the rate they should he despite decades of reforms and budget increases.

[写作内容]

1. 以约30词概括上文的主要内容。

2. 以约120词对用金钱鼓励孩子学习的现象进行议论,内容包括:

   (1) 你对用金钱鼓励孩子学习的看法:

   (2) 你的父母(或其他亲人)是如何鼓励你学习的;

   (3) 你认为怎样才能更好地鼓励孩子学习

[写作要求] 

1. 作文中可以使用亲身经历或虚构的故事,也可以参照阅读材料的内容,但不得直接引用原文中的句

    子。

2. 作文中不能出现真实姓名和学校名称。

     _____________________________________________________________________________________

________________________________________________________________________________________