题目

Need a room close to the US embassy for a week in early February I need a room close to the US embassy for a week in early February. My parents are going to the US embassy for visa interview on February 7th. I am looking for a place for them to stay around this date. Hotels are too expensive for them since they retired long ago. They speak Chinese only .Rent can be made through Paypal in USD or cash in CNY , if the price is right . Reply to : house—510574487 @ craigslist.org Expo housing Looking for 5 bedrooms from May 17-24 for the World Landscape Art Exposition Jinzhou China. Can be 一个容量100的样本，其数据的分组与各组的频数如下表：组别（0，10]（10，20]（20，30]（30，40]（40，50]（50，60]（60，70]频数1213241516137则样本数据落在（10，50]上的频率为（ ）A．0.13B．0.37C．0.52D．0.68