问题
选择题
观察下面的式子:
|
答案
13+23+33+43+53,
=(1+2+3+4+5)2,
=152,
=225;
故选:A.
观察下面的式子:
|
13+23+33+43+53,
=(1+2+3+4+5)2,
=152,
=225;
故选:A.
从方框中选出适当的句子补全对话。 | |
B: __1__ A: Do you have a friend here? B: Yes, I do. A: __2__ B: Oh. She is my friend, Amy. A: __3__ B: She comes from the U. S. A. A: She looks like Judy. B: __4__ A: Are they in the same class ? B: No. They are in the same grade, __5__ |