问题 单项选择题 A1/A2型题

诊断单克隆丙种球蛋白病时测定Ig最常见的定量方法是 ()

A.荧光免疫电泳

B.速率散射比浊法

C.免疫固定电泳

D.放射免疫电泳

E.ELISA

答案

参考答案:B

解析:目前免疫球蛋白定量检测以免疫浊度分析法为主,并有专门的测定设备,使得免疫球蛋白定量更加准确可靠,成为诊断疾病、判断病情和观察治疗效果的重要手段。因此本题最佳答案是B。

单项选择题
阅读理解

While watching the games the other night, I came across an unbelievable sight. It was not a gold medal, or a world record broken, but a show of courage.

The event was swimming and started with only three men on the blocks. For one reason or another, two of them false started, so they were disqualified. That left only one to complete. It would have been difficult enough, not having anyone to race against, even though the time on the clock is important.

I watched the man dive off the bock and knew right away that something was wrong. I’m not an expert swimmer, but I can tell a good dive from a poor one, and this was not exactly medal quality. When he resurfaced, it was evident that the man was not out for gold — his arms were waving in an attempt at freestyle. The crowd started to laugh. Clearly this man was not a medal competitor.

I listened to the crowd begin to laugh at this poor man who was clearly having a hard time. Finally he made his turn to start back. It was pitiful. He made a few desperate strokes and you could tell he was worn out.

But in those few awful strokes, the crowd had changed.

No longer were they laughing, but beginning to cheer. Some even began to stand and shout “Come on, you can do it!” and he did.

A clear minute past the average swimmer, this young man finally finished his race. The crowd went wild. You would have thought that he had won the gold, and should have. Even though he recorded one of the slowest times in Olympic history, this man gave more heart than any of the other competitors.

Just a short year ago, he had never even swum, let alone race. His country had been invited to Sydney.

In a competition where athletes remove their silver medals feeling they have somehow been cheated out of gold, or when they act so proudly in front of their competitors, it is nice to watch an underdog.

68.From the passage we can learn that the young man _______.

A. made his turn to start back pitifully    

B. was skillful in freestyle in the game

C. swam faster than the average swimmer   

D. was not capable enough to win the medal

69.   The crowd changed their attitudes because _______.

A. they felt sorry for the young man                 

B. they wanted to show their sympathy

C. they were moved by the young man              

D. they meant to please the young man

70.   According to the passage, “it is nice to watch an underdog” probably means _______.

A. it’s amusing to watch a man with awful swimming skills

B. it’s amazing to watch an ordinary man challenging himself

C. it’s cheerful for athletes to act proudly before their competitors

D. it’s brave enough for some athletes to remove the silver medals

71.   What’s the best title for the passage?

A. Go for it!                                      B. Try again!

C. Compete for Gold!                         D. Break a Record!