问题 单项选择题

以下有关PC机声卡的叙述中,错误的是

A.声卡用来控制声音的输入输出,目前PC机声卡大多是PCI声卡

B.PC机声卡的核心是数字信号处理器(DSP),它在完成数字声音的编码、解码和许多编辑操作中起着重要的作用

C.PC机声卡中处理的数字声音有波形声音和MIDI合成声音两类

D.PC机声卡附带的MIDI合成器都是数字调频(FM)合成器

答案

参考答案:D

解析: 该题考查考生对PC机声卡的理解。根据音乐生成的原理,PC机声卡使用的MIDI合成器分成两类:数字调频(FM)合成器和PCM波形合成器,所以选项D是错误的,其他三项是对PC机声卡功能和特点的正确描述,所以应该选D。

解答题
单项选择题

There are many kinds of friends. Some are always (1) you, but don’t understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only (2) friends leave footprints.

I shall always recall the autumn and the girl with the (3) . She will always bring back the friendship between us. I know she will always be my best friend.It was the golden season. I could see the yellow leaves (4) with the cool (5) . In such a season, I liked walking alone on the roads covered with leaves, (6) to the sound of them.Autumn is a (7) season and life is uninteresting. The free days always get me (8) . But one day, the sound of a violin (9) into my ears like a stream flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was (10) in playing her violin.

I had (11) seen her before. The music was so nice that I listened quietly. Lost in the music, I didn’t know that I had been (12) there for so long but my existence did not seem to disturb her.Leaves were still falling. Every day she played the violin at the comer of the building (13) I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became (14) . (15) we didn’t know each other, I thought we were already good friends. I believe she also loved me.Autumn was nearly over. One day, when I was listening carefully, the sound suddenly (16) . To my astonishment, the girl came over to me.

"You must like music from the violin." she said."Yes. And you play very well. Why did you stop’." I asked.Suddenly, a (17) expression appeared on her face and I could feel something unusual."I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that (18) me. " she said."In fact, it was your playing (19) gave me a meaningful autumn," I answered, " Let’s be friends. "The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen to her. Only thick leaves were left behind. But I will always remember the fine figure of the girl. She is like a (20) —so short, so bright, like a shooting star giving off so much light that makes the autumn beautiful.

 

第(15)空应选择()

A.But 

B.However 

C.Even 

D.Though