评价一个压缩算法的优劣的技术指标有什么？
参考答案：
有压缩比、恢复效果和算法效率三项指标。
用所给词的适当形式填空。
l. He worked hard and has_____ (great) improved his English.
2. My mother always _____ (courage) me to study hard.
3. We all think Nie Haisheng and Fei Junlong are both_____ (hero),
4. Lei Feng's _____ (die) upset everybody.
5. Ba Jin was a great_____ (write).
电视剧《京华烟云》根据同名小说改变，原作者是（）。
A.老舍
B.周作人
C.沈从文
D.林语堂
