(单选题)18: The purpose of new technology is to make life easier,____________it more difficult. A: not making B: not make C: not to make D: nor to make ...

(单选题)12: I'm going to Xi'an next week. Have you anything ____________to your parents? A: to take B: to be taken C: to be bought to D: to buy ...

(单选题)6: John does a lot of housework every evening, but now he ____________his schoolmates with their lessons. A: help B: is helping C: helps D: has helped ...

(单选题)25: Silver is____________the best conductor. A: even B: more C: very D: by far ...

(单选题)19: Come and sit down by the fire. Your hand____________. A: feel so coldly B: is feeling so cold C: feels so cold D: is felt so cold ...

(单选题)13: He thought that ____________. A: the effort doing the job was not worth B: the effort was not worth in doing the job C: it was not worth the effort doing the job D: it was not worth the effort by doing the job ...

(单选题)7: The event ____________ at the time last year. A: happens B: happened C: is happened D: was happened ...

(单选题)1: I am sorry____________ written you a letter at the time. A: to have not B: to not have C: not to have D: not having ...

(多选题)19: JPEG定义了（ ）编码模式。 A: DCT顺序模式 B: DCT渐进模式 C: 无失真编码模式 D: 分层编码模式 ...

(单选题)1: 信息论中，编码数据量与所表示的信息量以及冗余信息之间的关系为（ ）。 A: 数据量＝信息量＋冗余量 B: 信息量＝数据量＋冗余量 C: 数据量＝信息量 - 冗余量 D: 信息量＝冗余量 - 数据量 ...