A:中国:甲;印度:乙;希腊:丙
B:中国:丙;印度:甲;希腊:乙
C:中国:丙;印度:乙;希腊:甲
D:中国:乙;印度:丙;希腊:甲
已知tanαtanα-1=﹣1,求下列各式的值:
(1)sinα-3cosαsinα+cosα;
(2)sin2α+sin αcos α+2.
①科学知识中的思想或理念
②中华民族精神的力量之源
③对中华民族精神的丰富和发展
④对中华民族精神的承袭和弘扬
看图,阅读短文,判断正误。
Tommy is a boy. He is apupil. He is a short and thin. He is ten. He gets up early every morning. He gets up at half past six. He brushes his teeth at a quarter to seven in the morning. He goes to school at half past seven in the morning.