题目

根据句意，用所给单词的适当形式填空。 1. They say she is ___________(suit) for the job as an accountant. 2. The accident was caused by ________ (粗心). 3. Do you know when America __________ (discover)? 4. Miss Li did what she could _______(help ) her students. 5. What difficulty the little boy has __________(finish) the task by himself! 答案：1.suitable; 2. carelessness; 3. was discovered; 4. to help; 5. finishing.（2002•绍兴）若一个三角形的三边长均满足方程x2-6x+8=0，则此三角形的周长为    ．