问题
单项选择题
AIDS病人晚期外周血细胞减少最显著的是
A．CD4+细胞
B．CD8+细胞
C．CD16+细胞
D．CD14+细胞
答案
参考答案：A
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AIDS病人晚期外周血细胞减少最显著的是
A．CD4+细胞
B．CD8+细胞
C．CD16+细胞
D．CD14+细胞
参考答案：A
Peter Wiggins grew up in a poor family. He worked diligently at his ____ job as teaching assistant in a private kindergarten and put in three more hours at night as a parttime cashier at a ___. By the time Peter walked home with slow and heavy steps every day，it was often close to ____. Peter worked very hard in order to ____ his aged parents who had retired as restroom cleaners with ____ savings left after putting Peter and his sister through school. Peter was the only ___， for his sister, Beth, was often in poor health. One day, as Peter was walking home from ACE Supermarket where he ____， he stumbled(绊脚) upon a small brown packet on the pavement. The package was slightly ____. So he picked it up to examine it more closely. To his ____， it contained fiftydollar bills. Peter knew it was not his to keep and that the ____ might urgently need the money. Without ____， Peter walked quickly to the nearest police station and handed it over to Mr. Roberts who was the police officer ____ for that night. Surprised to see someone hand in such a large amount of cash ____，the police officer said that Peter was indeed a role model others could ____. “It's nothing really...I was doing what ____ would have done，” Peter's face turned red as the officer continued to ask for his name and contact number so that the owner could ____ thank him. The next day, Peter received a ____. The owner of the lost money was none other than Peter's ____ at the ACE Supermarket! He had found out about Peter from Roberts and had decided to ____ Peter to the position of manager with a handsome increase in salary. He had also decided to pay for Beth's ___.Peter was overjoyed.
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