瓷嵌体与金属嵌体相比，最大的优点是（） A.物理性能稳定 B.制作工艺简单 C.机械

             Japanese students work very hard but many are unhappy, because they feel heavy pressures from their parents. Most students are always told to study hard so that they can live a wonderful life. However, many of the students have tried very hard at school but have failed their exams. These students feel sad, and they don't want to go to school anymore. They easily become dropouts (辍学者). Such students may join the groups of trouble-makers and turn to crime (犯罪).

             Though most Japanese parents are worried about their children, they do not help them in any way. Many parents feel that they are not able to help their children and it is the teachers' job to help their children. A lot of parents also send their children to other schools in evenings or on weekends, but these only help the students to pass their exams and never teach the students how to understand life and the world.

            Many Japanese schools usually have rules about everything, from the students' hair to their clothes and the things in their schoolbags. Many child psychologists now think that the rules are too strict and harmful (有伤害的) to the feelings of the students. Almost 40% of the students said that no one had taught them how to get on with others, how to tell right from wrong, or how to show love for others, even for their parents.    

 根据短文内容，选择最佳选项。

1. Why are many Japanese students unhappy?

A. Because they don't live a rich life.

B. Because they can't afford to pay for their education.

C. Because they feel heavy pressures from their parents.

D. Because they often cause a lot of trouble for their parents.

2. What Japanese students easily become dropouts according to the passage?.

A. The students who do well in their studies and get good grades.

B. The students who fail their exams and feel unhappy at school.

C. The students who are not able to get help from their parents.

D. The students who have classes in evenings or on weekends

3. What do many child psychologists think of the school rules in Japan?

A. Strict.        

B. Really good.

C. Helpful.    

D. Important.

4. What can we learn from the passage?

A. Most Japanese parents try their best to help their children.

B. Japanese students like to make trouble in and out of school.

C. Almost 40% of the Japanese students learn little about life from their school.  

D. Japanese parents never make their children study hard for a wonderful future.

5. Which of the following is the BEST title for the passage?

A. Education in Japan

B. Japanese under pressure

C. Trouble in Japan  

D. Pressures of being a student in Japan

阅读世界年平均气温的分布图，回答下列问题．

（1）世界气温的水平分布规律是从______向______逐渐降低，其形成原因是______．

（2）在图上找出-10℃等温线，说明世界寒冷的地带分布在______．

（3）在图上找出20℃等温线，说明世界炎热地带分布的主要纬度范围是______．

（4）A、B两地纬度一致，而______点气温相对低，其原因是______．

患者，男，69岁，左鼻出血1h。1h前突然出现左鼻出血，量约250ml，遂来急诊。既往无鼻出血病史。检查：不断有鲜血自左鼻孔溢出及从口中吐出。鼻腔及鼻咽部未见新生物，出血来源于鼻腔后部，不能窥视到明确出血点，急行前后鼻孔填塞后出血止。辅助检查：血：WBC6．8×10／L，RBC4．99×10／L，Hb137g／L，PLT145g／L，BT2分，CT2分。血型"A".胸片正常，心电图正常。 请回答下列问题：

诊断

女性，45岁。右下肢肌无力3月余，进行性加重，左下半身麻木。体检：左侧 * * 水平以下痛、温度觉减退，右下肢腱反射亢进，右侧Babinski征阳性，右侧髂前上嵴以下音叉振动觉减退，右足趾位置觉减退。脊髓损害的部位是（）。

A.左侧T水平半侧损害

B.右侧T水平后索损害

C.T水平横贯性损害

D.右侧T水平半侧损害

E.右侧T水平侧索损害

甘露醇的不良反应是什么？