(单选题)24: Corn originated in the New World and thus was not known in Europe until Columbus found it ________ in Cuba. A: being cultivated B: been cultivated C: having cultivated D: cultivating ...

(单选题)12: Not until the game had begun ________ at the sports ground. A: had he arrived B: would he have arrived C: did he arrive D: should he have arrived ...

(单选题)6: I’d ________ his reputation with other farmers and business people in the community, and then make a decision about whether or not to approve a loan. A: take into account B: account for C: make up for D: make out ...

(单选题)25: Young people are not ________ to stand and look at works of art; they want art they can participate in. A: conservative B: content C: confident D: generous ...

(单选题)19: The suggestion that the major ________ the prizes was accepted by everyone. A: would present B: present C: presents D: ought to present ...

(单选题)13: The words of his old teacher left a ________ impression on his mind. He is still influenced by them. A: long  B: lively C: lasting  D: liberal ...

(单选题)7: Peter, who had been driving all day, suggested ________ at the next town. A: to stop B: stopping C: stop D: having stopped ...

(单选题)1: Everybody ________ in the hall where they were welcomed by the secretary. A: assembled B: accumulated C: piled D: joined ...

(判断题)20: MCS-51采用了7种寻址方式（） A: 错误 B: 正确 ...

(单选题)2: MCS-51的指令系统按指令功能划分可分为（）大类 A: 二 B: 三 C: 四 D: 五 ...