A:公差为的等差数列
B:公差为的等差数列
C:公比为的等比数列
D:公比为的等比数列
下表是一个家庭中各成员性状的调查结果,请根据结果回答:
—How many people were there at the meeting?
—_______.
中国与东南亚陆地相邻的一组国家是( )