问题 单项选择题

急性胰腺炎发病12小时以内,下列哪一项改变明显

A.血钙

B.血糖

C.血淀粉酶

D.血脂肪酶

E.尿淀粉酶

答案

参考答案:C

解析:胰酶的增高是诊断急性胰腺炎的重要依据之一。在发病3~4小时后,血清淀粉酶即可高于正常,24小时达高峰,4~5天后逐渐恢复正常,尿淀粉酶增高出现较迟,24小时后才开始增高,48小时达高峰,1~2周恢复正常。血脂肪酶的升高也在发病24小时以后,检查方法不如尿淀粉酶简便易行,临床上很少用。一般非出血坏死型重症胰腺炎,血钙、血糖的改变不明显。

单项选择题
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     阅读下面短文并回答问题,然后将答案写到答题卡相应的位置上。

[1]Peer tutoring benefits many students in several ways. Peer tutors can help themselves in

understanding materials. They have to master the material themselves and come to a deeper

understanding to teach others rather than getting taught by a teacher.

[2]Peer tutors get communication and social skills by tutoring. In order to communicate the meaning

of material clearly and make it understood, they must practice the necessary skills to communicate with

other people. These skills also carry over socially as it's much easier, especially for shy children to

communicate with someone than to communicate with a large group as in a classroom. It's common for

the tutor and his student to become friends. Developing leadership skills, confidence and a sense of

responsibility is easy for a tutor. The tutor becomes a better student, gains more confidence and

understands the teacher's role better.

[3]Those ___________ can also benefit greatly from peer tutoring. Since the tutors are of the same

age as the students, it's more comfortable for the children who have trouble with the material and in need

of help to get taught by the same age tutors. This will allow them to ask more questions without fear and

to come to a better understanding of the material. The tutor may be able to pass on little tips and tricks

that helped him understand the material better.

[4]The process of peer tutoring works for all the related people. It's easy to relate to someone of the

same age. The tutor learns to improve skills useful later in life. The teacher has more time to concentrate

on students. It's a winning situation for everyone.

 1. What is the purpose of the passage ?  (no more than 10 words )

___________________________________________________________

2. What is peer tutoring according to the text?(no more than 12 words)

___________________________________________________________

3. What are the benefits of being a peer tutor?(no more than 12 words)  

  1)_____________________ 2)__________________________

4. Fill in the blank in Paragraph 2 with proper words.(no more than 5 words)  

__________________________________________________

5. What does the word "it " (paragraph 2)probably refer to ? (no more than 5words)

   ______________________________________________________________.