I don't know________. Can you tell me, please?
A:how the two players are old
B:how old are the two players
C:the two players are how old
D:how old the two players are
在括号里填上合适的单位。
手掌宽大约80____ 数学书封面的长边大约是2____
茶几的高度大约是5____ 黄河的长度大约是5464____
与澳门毗邻的经济特区是( )