【单选题】Britain, in ______ with many other industrialized countries, has experienced major changes over the last 100 years. [ ]
【简答题】下列清洗方法中,不属于乳化原理的是( ) A.用盐酸清除水垢(碳酸钙) B.用洗涤剂清洗餐具 C.用肥皂液洗衣服 D.用洗发液洗头
【单选题】.影响船舶保向性的因素有( ) 1航向稳定性;2操舵技能;3舵机性能;4外界干扰。
【单选题】There is ________ snow in the northern part of China. [ ]