看笔的外观是否异常,掂其重量是否与正常相符,按下笔身的开关或打开笔身检查是否()成笔刀或笔枪。
A.改装
B.变动
C.更改
D.重装
参考答案:A
As a simple and convenient way to get latest fashions online, online shopping also has major problem—you can’t see whether they fit or not.
A.the; the
B.不填; the
C.the; a
D.不填; 不填
试比较脓肿和蜂窝织炎的区别。