题干
.
The man to whom we handed the forms pointed out that they had not been ________ filled in.
The man to whom we handed the forms pointed out that they had not been ________ filled in.
A：slightly
B：properly
C：regularly
D：eventually
答案(点此获取答案解析）
B
线段AF中，AB=a,BC=b,CD=c,DE=d,EF=e.则以A,B,C,D,E,F为端点的所有线段长度的和为( )