某男孩，7岁，发热，腰痛，伴巩膜发黄两周初次就诊，一年来有类

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问题单项选择题

某男孩，7岁，发热，腰痛，伴巩膜发黄两周初次就诊，一年来有类似发作史，无酱油色尿，脾脏肋下3cm，血红蛋白65g／L，网织红细胞12％，骨髓红系明显增生，尿隐血试验阳性，直接Coomb试验阳性，针对病因，目前该病人首选下列哪种治疗（）

A.脾脏切除

B.糖皮质激素

C.环磷酰胺

D.碳酸氢钠

E.维生素B12

答案

参考答案：B

阅读理解

阅读下面的短文，根据短文内容判断句子正(T)误(F)

One of the most important world problems is the growing population on the earth. The population of the world today

is more than 6,500,000,000. That is a great number and we know it quite well. The important thing is not how large the

population of the world is now, but is the speed of the growth. It's about 1.63% every year.

In order to give you some ideas of the birth rate, look at the second hand of your watch. Every second, four babies

are born in the world. Another baby! Another baby! Another baby! Another baby! You cannot speak quickly enough

to keep up with the birth rate. The population is growing faster and faster. In one day, people have to find food for over

350,000 mouths more.

This growing population will make a big problem by the year 2010-there will be as many as 7,000,000,000 people on

the earth! So this is one of the biggest problems that you are going to see in your life.

( )1. The growing of death is one of the most important world problems.

( )2. The speed of the growth is slowing down.

( )3. Four babies are born every second in the world.

( )4. In one year, people have to find food for over 350,000 mouths more.

( )5. A big problem caused by the population will appear by the year 2010.

解答题

直线l₁：y=2x+1与经过点（3，-5）的直线l₂关于y轴对称，求直线l₂的解析式．