声卡是PC机的基本组成部件，主要用于控制波形声音和MIDI声音的输入和输出。下面是有关声卡功能的描述：Ⅰ.能把模拟声音信号转换为一进位数字表示形式Ⅱ.能将数字声音还原为模拟声音信号，然后通过扬声器输出Ⅲ.具有语音识别和语音合成的功能Ⅳ.能将多路模拟音频信号进行混音输出以上叙述中，哪些是正确的？
A．仅I和Ⅱ
B．仅I、Ⅱ和Ⅳ
C．仅I和Ⅲ
D．全部
参考答案：D
| 根据对话内容，将方框内符合对话情景的句子抄写在对话的空白处，使对话恢复完整，选项中有两项是多余的。 | |
| A: Hi, Alice! How was your last summer holiday? B: 1__________________ A: Where dicl you go? B: I went to Yinchuan with my parents. A: 2__________________ B: It's one of the most beautiful cities in the northwest of China. I like it very much. A: How long did you stay there? B: We stayed there for five days. 3__________________ A: Which is your favorite place? B: 4 __________________When I was there, I lost myself in the beautiful scenery. A: What interesting things did you do there? B: Lots of things, such as swimming, boating, fishing and riding camels. 5__________________ A: Oh, really, I can't wait to go there. | |
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