A:Talk quietly
B:Keep your desk clean
C:Take turns
Don't throw waste paper everywhere.It's our duty to keep our school .
将下列陈述句改成反问句
①许海峰夺得了一枚金牌。 ②许海峰前三枪打得不错。
澳门领土由____岛、____ 和____ 岛组成.
如下图所示,甲、乙、丙是三个立体图形的三视图,甲、乙、丙对应的标号正确的是( )①长方体 ②圆锥 ③三棱锥 ④圆柱