可不可以說方程x^2-2x+1=0所有實數根的集合是{1,1}

可不可以說方程x^2-2x+1=0所有實數根的集合是{1,1}

可以這樣說：
方程x^2-2x+1=0所有實數根的集合是{1}.

【九年級英語】2道根據首字母提示寫單詞
1.The Great Wall is one of the seven w__________of the world.
2.Though the work is hard，I think he can finish the a_______on time .

1.wonders
2.appoinment

根據首字母提示完成單詞（單詞全是形容人的）
1、A--------people are strong and good at sports.
2、T--------people have a special talent for something like music，science and so on.
3、L--------people are always kind to others and love others.
4、K--------people have much knowledge and know a lot.
5、B--------people are not afraid of anything，even losing their lives.
6、S--------people achieve great success in many ways.
7、C--------people usually do everything very carefully.
8、O--------people are very famous and do a lot for our society.
9、P--------people can do things with great patience.
10、E------people are hardly ever tired.
Thankyou .請快速回答

1.athletic
2.talent
3.lovely
4.knowledgable
5.brave
6.successful
7.cautious
8.officer
9.patient
10.energetic