— How do you like the regulations of our school?
— The regulations are strict with the students and they require that students _______ at least 90% of the lectures.
A:will attend
B:will take part in
C:should attend
D:should take part in
中纬度与低纬度,中纬度与高纬度的分界纬线是30°和60°纬线.( )(判断对错)
融入了中国杂技的《人猿泰山》娱乐演出,讲普通话的辛巴,唱京剧的丁满,以跳跳虎、猴子阿布等为代表的中国十二生肖……上海迪士尼的“中国风”随处可见,这不仅毫无“违和感”,还让人眼前一亮,材料表明( )
如图,圆的四条半径分别是OA,OB,OC,OD,其中点O,A,B在同一条直线上,∠AOD=90°,∠AOC=3∠BOC,那么圆被四条半径分成的四个扇形的面积的比是( )