【单选题】12-23.When I first arrived in Japan, I was surprised ____ the way people greeted each other.
【单选题】In ____Japan ,_____baseball is ____most popular sport.
【判断题】碳素结构钢是一种普通碳素钢,不含合金元素,可用于制造厂房、桥梁和船舶等建筑工程结构。
【单选题】In ____Japan ,_____baseball is ____most popular sport.