改正下算式。
18×(420-320÷20)
=18×(100÷20)
=18×5
=0
=18×(400-16)
=18×404
=7272
I wasn't blaming anyone; I _____ said errors like this could be avoided.[ ]
A. merely
B. mostly
C. rarely
D. nearly
同样意义的礼仪可能有不同的表现形式,这体现了礼仪的______特征。
A.规范性B.可操作性C.变动性D.差异性