【多选题】What did Yanglan tell the audience in her speech?
A.
Girls should be beautiful and sweet
B.
Being different is good
D.
Being different is difficult
【多选题】管理评审是为了确保质量管理体系的( )。
【判断题】“PPS sampling”指的是整群比例抽样。()
【单选题】The quiet girl has_____ since she modelled herself _______ Yanglan .