化简:3x2-(4xy-5y2)-2(x2-3yx+2y2)
原式=3x2-4xy+5y2-2x2+6yx-4y2
=x2+2xy+y2.
根据句意及首字母提示,写出单词。
1. Are you r_____ boys and girls?
2. It's a q_____ past nine. Shall we go to bed?
3. He doesn't b_____ his teeth every evening.
4. Ben,we are late for the party. Be q _____, please.
5. Lucy and Lily are twins. They are the s_____ age.
对于研究古代特洛伊战争具有第一手史料价值的作品是
A.《希腊史》(格罗特著)
B.影片《特洛伊》
C.油画《帕里斯的裁判》
D.《荷马史诗》