题型:选择题 _____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns. A.PutB.PuttingC.Having putD.Being put 查看答案
题型:单项选择题 下列关于有损压缩的说法中正确的是 (35) 。A.压缩过程可逆,相对无损压缩其压缩比较高B.压缩过程可逆,相对无损压缩其压缩比较低C.压缩过程不可逆,相对无损压缩其压缩比较高D.压缩过程不可逆,相对无损压缩其压缩比较低 查看答案