手机阅读客户端中的“搜索”功能支持多少个字符的输入？（）A.40个英文 B.20个英

关于尿路结石预防机制，以下正确的是

A．服维生素B6以增加尿中草酸盐溶解

B．服氧化镁以减少尿中草酸盐排出

C．碱化尿液以利于磷酸盐的溶解

D．患草酸盐结石应多吃菠菜西红柿，多吃高蛋白高糖

E．别嘌呤醇可使尿酸形成减少

阅读理解。

     A young man was getting ready to graduate from college. For many months he had admired a beautiful

sports car in a dealer's showroom, and knowing his father could well afford it, he told him that was all he

wanted.

     As Graduation Day approached, the young man awaited signs that his father had purchased the car. Finally,

on the morning of his graduation, his father called him into his private study. His father told him how proud he

was to have such a fine son, and told him how much he loved him. He handed his son a beautifully wrapped

gift box. Curious, and somewhat disappointed, the young man opened the box and found a lovely, leather

bound Bible, with the young man's name marked in gold. Angrily, he shouted at his father and said"with all

your money, you give me a Bible?" and stormed out of the house, leaving the Bible.

     Many years passed and the young man had become very successful in business. He had a beautiful home

and wonderful family, but realized his father now was getting old, and thought perhaps he should go see him.

He had not seen him since that graduation day. However, before he could make arrangements, he received a

mail telling him his father had passed away.

     When he arrived at his father's house, sudden sadness and regret filled his heart. He began to search

through his father's important papers and saw the still gift-wrapped Bible, just as he had left it years ago. With

tears, he opened the Bible and was about to turn pages whena ear key dropped from the back of the Bible. It

had a tag with the dealer's name, the same dealer who had the sports car he had wanted. On the tag was the

date of his graduation, and the words PAID IN FULL.

     How many times do we miss God's blessings because we can't see past our own desires?

1. Why did the young man warn the sports ear eagerly?

A. His classmates all had such cars.

B. His father once promised him a car.

C. He had a high regard for the car.

D. His father encouraged him to buy a car.

2. Which of the following is NOT TRUE to the passage?

A. The young man misunderstood his father on his graduation Day.

B. The gift he received in his father's study was wrapped very well.

C. The father put the car key in between the pages of a Bible.

D. The gift for graduation was a Bible instead of a sports ear.

3. What's the main idea about this passage?

A. Bible is the most educable thing.

B. Packing is very important for a gift.

C. There is no father but loves her son.

D. One may miss blessing only by judging the appearance of a gift.

4. In the end of the story, which of the following can describe the young man?

A. Disappointed

B. Regretful

C. Satisfied

D. Frightened

作为建池材料，石灰施用前必须经过熟化、过滤成（），并贮存一段时间。

AES加密算法不支持的密钥长度是( )位。

A．64

B．128

C．192

D．256

激光光凝可治疗中心性浆液性脉络膜视网膜病变。