单项选择题
未知题型
将20箱零件放在一起，混合均匀，并将零件从1~1000编号，然后用抽签的办法从中抽出100个零件组成样本的抽样...
单项选择题将20箱零件放在一起，混合均匀，并将零件从1~1000编号，然后用抽签的办法从中抽出100个零件组成样本的抽样方法为（ ）。
According to Billy, many banks in Beijing have been rep...
单项选择题According to Billy, many banks in Beijing have been reported to raise their mortgage rate from _______ to _______ recently.
