依次填入下面一段文字横线处的语句,衔接最恰当的一组是( )作为人民币的重要防伪特征,2015年版第五套人民币100元纸币设计了两条安全线。其中,光变镂空开窗安全线线宽4毫米,其光变性能对光源要求不高,颜色变化明显,集成镂空文字特征,更有利于公众识别。磁性全埋安全线采用了特殊磁性材料和先进技术,机读性能更好。中国人民银行表示, ,也有利于防止变造人民币。
Car prices have been going down sharply in the last 20 years.—It’s not surprising because the law of market ________ the price of a product
On the wall ______________ a picture.
Our class is planning to hold _____welcomeparty for _____exchange students from ________Britain.
Tomorrow would be Christmas Day, and she had only $1.87 ____.[ ]