常用波形编码方法有()(脉冲编码调制)、()(差值脉冲编码调制)和ADPCM(自适应差值编码调制)。
参考答案:PCM;DPCM
根据句意用所给单词的适当形式填空。
1. The famous (著名的)movie star Xie Tingfeng has a new ________(look).
2. He always wears a pair of heavy ________(glass).
3. My pen pal, Ann is of medium __________(high). And she is very beautiful.
4. Sun Yue, my favorite musician, ___________(have) long straight hair.
5. Zhang Hong likes telling ________(joke) to her friends.
部分匹配查询中有关通配符“%”的叙述中正确的是: (35) 。
A.“%”代表一个字符
B.“%”代表多个字符
C.“%”可以代表零个或多个字符
D.“%”不能与“_”一同使用