They usually watch cartoons at home doing outdoor activities.
A:instead of
B:instead
C:instead to
D:instead with
在三棱锥P﹣ABC中,PA=PB=PC=3,侧棱PA与底面ABC所成的角为60°,则该三棱锥外接球的体积为( )
影响冰岛火山活动的板块是()
注意:词数不少于60。
提示词:二维码QR code; 糖葫芦candy-coated haws(tanghulu)