问题
单项选择题
共射极放大电路的交流输出波形上半周失真时为（）
A、饱和失真
B、截止失真
C、交越失真
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
共射极放大电路的交流输出波形上半周失真时为（）
A、饱和失真
B、截止失真
C、交越失真
参考答案：B
Nick was not the kind of boy I had expected to spend my summer with. I was hoping to have a relaxation the summer before my busy senior year, __36__ my mother asked me to do her a __37__. One of her colleagues needed a full－time __38__. “You planned to volunteer at the local hospital; why not volunteer to __39__ Nick instead？” Then she told me that this six-year-old boy was not a __40__ child. Nick was a lovely little boy who suffered from many disorders. Normal day-care centers would not __41__ him. As a baby, he had serious ear infections which left him with equilibrium(平衡)problems. He couldn't __42__ or run properly. I was hesitating __43__ I was to take the job when my mother __44__, “Don't you want to be a nurse in the future? I doubt if you even have the __45__.” Then I told her I was __46__ for the job. The day started at 7：00 a．m. Nick was my wake-up call! With so much energy and very little __47__ , he was quite a mix. At the park, when he saw all the other children play on the jungle gym and swings, the boy's face __48__ up—How he wished he belonged to the group of his age! You would think it would be__49__ to get a child to go down a slide. Believe me, it wasn't! It took time, a lot of time. But with patience and support, Nick took one step up the slide each day. We worked together to face his __50__ and gradually he got closer to taking the slide of his life. Halfway through the summer, he __51__ it to the top of the slide. With my arms __52_ him tightly, we flew down the slide! I waited for his reaction. After realizing that he was safe and sound, he gave me a big __53__ and asked, “May I go down again, alone？” I had never been happier in my life when I saw this little child climb the ladder and enjoy what other children __54__ for granted. This __55__ child taught me that being a nurse means respect, kindness and patience.
|