第12题: [单项选择]It is desirable that the agreement ______ before the New Year's Day. A. was signed B. is signed C. be signed D. has been signed 参考答案:C 答案解析:本题考查的知识点是非人称手法,建议。 “It is形容词that从句”句型中,从句中使用省略should的动词原形。
第20题: [单项选择]用某种排序方法对序列(25,84,21,47,15,27,68,35,20) 进行排序,记录序列的变化情况如下: 15,20,21,25,47,27,68,35,84 15,20,21,25,35,27,47,68,84 15,20,21,25,27,35,47,68,84 则采取的排序方法是________。 A. 直接选择排序 B. 冒泡排序 C. 快速排序 D. 希尔排序 参考答案:C